GLBP 심화 실습 / GLBP 패킷

 

 

랩 구축

• VLAN 10, 20 사용
• EIGRP 사용
• ESW 1,2,3,4는 L3SW. ESW 5는 L2SW
  • ESW1
    • vlan 10 : priority 150, weight 120
  • ESW2
    • vlan 10 : priority 120
    • vlan 20 : priority 100
  • ESW3
    • vlan 10 : priority 100
    • vlan 20 : priority 120
  • ESW1
    • vlan 20 : priority 150, weight 120

R1

R1 sh run

Building configuration...

Current configuration : 1794 bytes
!
upgrade fpd auto
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
ip source-route
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
voice dsp waitstate 0
!
!
!
!
!
!
!
!
!
!
!
!
!
memory-size iomem 0
archive
 log config
  hidekeys
! 
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface Loopback10
 ip address 100.100.100.1 255.255.255.0
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex half
!
interface Serial1/0
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/1
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/2
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial1/3
 no ip address
 shutdown
 serial restart-delay 0
!
interface Ethernet2/0
 ip address 1.1.1.1 255.255.255.0
 duplex half
!
interface Ethernet2/1
 ip address 2.1.1.1 255.255.255.0
 duplex half
!
interface Ethernet2/2
 ip address 3.1.1.1 255.255.255.0
 duplex half
!
interface Ethernet2/3
 ip address 4.1.1.1 255.255.255.0
 duplex half
!
router eigrp 1
 network 1.1.1.0 0.0.0.255
 network 2.1.1.0 0.0.0.255
 network 3.1.1.0 0.0.0.255
 network 4.1.1.0 0.0.0.255
 network 100.100.100.0 0.0.0.255
 no auto-summary
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
!
logging alarm informational
no cdp log mismatch duplex
!
!
!
!
!
!
!
control-plane
!
!
!
mgcp fax t38 ecm
!
!
!
!
gatekeeper
 shutdown
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
 stopbits 1
line vty 0 4
 login
!
end

ESW0

ESW0 sh run

Building configuration...

Current configuration : 2822 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
!
hostname ESW1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
vtp file nvram:vlan.dat


!
!
ip tcp synwait-time 5
!
track 1 interface FastEthernet0/1 line-protocol
! 
!
!
!
!
interface FastEthernet0/0
 description *** Unused for Layer2 EtherSwitch ***
 ip address 1.1.1.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
 switchport access vlan 10
 duplex full
 speed 100
!
interface FastEthernet1/1
 duplex full
 speed 100
!
interface FastEthernet1/2
 duplex full
 speed 100
!
interface FastEthernet1/3
 duplex full
 speed 100
!
interface FastEthernet1/4
 duplex full
 speed 100
!
interface FastEthernet1/5
 duplex full
 speed 100
!
interface FastEthernet1/6
 duplex full
 speed 100
!
interface FastEthernet1/7
 duplex full
 speed 100
!
interface FastEthernet1/8
 duplex full
 speed 100
!
interface FastEthernet1/9
 duplex full
 speed 100
!
interface FastEthernet1/10
 duplex full
 speed 100
!
interface FastEthernet1/11
 duplex full
 speed 100
!
interface FastEthernet1/12
 duplex full
 speed 100
!
interface FastEthernet1/13
 duplex full
 speed 100
!
interface FastEthernet1/14

 duplex full
 speed 100
!
interface FastEthernet1/15
 duplex full
 speed 100
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan10
 ip address 10.1.1.1 255.255.255.0
 glbp 1 ip 10.1.1.254
 glbp 1 priority 150
 glbp 1 preempt
 glbp 1 weighting 120 lower 95
 glbp 1 weighting track 1
!
router eigrp 1
 network 1.1.1.0 0.0.0.255
 network 10.1.1.0 0.0.0.255
 no auto-summary
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
banner exec ^C

***************************************************************
This is a normal Router with a SW module inside (NM-16ESW)
It has been preconfigured with hard coded speed and duplex

To create vlans use the command "vlan database" from exec mode
After creating all desired vlans use "exit" to apply the config

To view existing vlans use the command "show vlan-switch brief"

Warning: You are using an old IOS image for this router.
Please update the IOS to enable the "macro" command!
***************************************************************

^C
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

ESW0 sh glbp bri

Interface   Grp  Fwd Pri State    Address         Active router   Standby router

Vl10        1    -   150 Active   10.1.1.254      local           10.1.1.2
Vl10        1    1   -   Active   0007.b400.0101  local           -
Vl10        1    2   -   Listen   0007.b400.0102  10.1.1.2        -
Vl10        1    3   -   Listen   0007.b400.0103  10.1.1.3        -

ESW0 sh glbp

Vlan10 - Group 1
  State is Active
    2 state changes, last state change 00:57:34
  Virtual IP address is 10.1.1.254
  Hello time 3 sec, hold time 10 sec
    Next hello sent in 1.284 secs
  Redirect time 600 sec, forwarder time-out 14400 sec
  Preemption enabled, min delay 0 sec
  Active is local
  Standby is 10.1.1.2, priority 120 (expires in 8.252 sec)
  Priority 150 (configured)
  Weighting 110 (configured 120), thresholds: lower 95, upper 120
    Track object 1 state Down decrement 10
  Load balancing: round-robin
  Group members:
    c402.0450.0000 (10.1.1.1) local
    c403.25cc.0000 (10.1.1.2)
    c404.41f0.0000 (10.1.1.3)
  There are 3 forwarders (1 active)
  Forwarder 1
    State is Active
      1 state change, last state change 00:57:24
    MAC address is 0007.b400.0101 (default)
    Owner ID is c402.0450.0000
    Redirection enabled
    Preemption enabled, min delay 30 sec
    Active is local, weighting 110

    Arp replies sent: 1
  Forwarder 2
    State is Listen
      2 state changes, last state change 00:56:42
    MAC address is 0007.b400.0102 (learnt)
    Owner ID is c403.25cc.0000
    Redirection enabled, 599.412 sec remaining (maximum 600 sec)
    Time to live: 14399.408 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 10.1.1.2 (primary), weighting 90 (expires in 9.404 sec)
  Forwarder 3
    State is Listen
      2 state changes, last state change 00:56:27
    MAC address is 0007.b400.0103 (learnt)

    Owner ID is c404.41f0.0000

    Redirection enabled, 599.632 sec remaining (maximum 600 sec)
    Time to live: 14399.628 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 10.1.1.3 (primary), weighting 90 (expires in 9.624 sec)

ESW1

ESW1 sh run

Building configuration...

Current configuration : 3112 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
!
hostname ESW2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
vtp file nvram:vlan.dat


!
!
ip tcp synwait-time 5
!
track 1 interface FastEthernet0/1 line-protocol
! 
!
!
!
!
interface FastEthernet0/0
 description *** Unused for Layer2 EtherSwitch ***
 ip address 2.1.1.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
 switchport access vlan 10
 duplex full
 speed 100
!
interface FastEthernet1/1
 switchport 
*Mar  1 00:59:35.379: %GLBP-6-FWDSTATECHANGE: Vlan20 Grp 2 Fwd 3 state Listen -> Active
*Mar  1 00:59:36.215: %GLBP-6-FWDSTATECHANGE: Vlan20 Grp 2 Fwd 3 state Active -> Listen
*Mar  1 00:59:36.419: %GLBP-6-STATECHANGE: Vlan10 Grp 1 state Standby -> Active
*Mar  1 00:59:36.423: %GLBP-6-FWDSTATECHANGE: Vlan10 Grp 1 Fwd 1 state Listen -> Active
*Mar  1 00:59:36.503: %GLBP-6-STATECHANGE: Vlan10 Grp 1 state Active -> Speak
*Mar  1 00:59:36.503: %GLBP-6-FWDSTATECHANGE: Vlan10 Grp 1 Fwd 1 state Active -> Listen
*Mar  1 00:59:36.503: %GLBP-6-FWDSTATECHANGE: Vlan10 Grp 1 Fwd 3 state Listen -> Active
*Mar  1 00:59:37.327: %GLBP-6-FWDSTATECHANGE: Vlan20 Grp 2 Fwd 1 state Listen -> Active
*Mar  1 00:59:37.355: %GLBP-6-FWDSTATECHANGE: Vlan10 Grp 1 Fwd 3 state Active -> Listen
*Mar  1 00:59:38.295: %GLBP-6-FWDSTATECHANGE: Vlan20 Grp 2 Fwd 1 state Active -> Listenaccess vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/2
 duplex full
 speed 100
!
interface FastEthernet1/3
 duplex full
 speed 100
!
interface FastEthernet1/4
 duplex full
 speed 100
!
interface FastEthernet1/5
 duplex full
 speed 100
!
interface FastEthernet1/6
 duplex full
 speed 100
!
interface FastEthernet1/7
 duplex full
 speed 100
!
interface FastEthernet1/8
 duplex full
 speed 100
!
interface FastEthernet1/9
 duplex full
 speed 100
!
interface FastEthernet1/10
 duplex full
 speed 100
!
interface FastEthernet1/11
 duplex full
 speed 100
!
interface FastEthernet1/12
 duplex full
 speed 100
!
interface FastEthernet1/13
 duplex full
 speed 100
!
interface FastEthernet1/14
 duplex full
 speed 100
!
interface FastEthernet1/15
 duplex full
 speed 100
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan10
 ip address 10.1.1.2 255.255.255.0
 glbp 1 ip 10.1.1.254
 glbp 1 priority 120
 glbp 1 preempt
 
*Mar  1 00:59:39.039: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 2.1.1.1 (FastEthernet0/0) is down: holding time expired
*Mar  1 00:59:40.235: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 2.1.1.1 (FastEthernet0/0) is up: new adjacencyglbp 1 weighting track 1
!
interface Vlan20
 ip address 20.1.1.1 255.255.255.0
 glbp 2 ip 20.1.1.254
 glbp 2 preempt
 glbp 2 weighting track 1
!
router eigrp 1
 network 2.1.1.0 0.0.0.255
 network 10.1.1.0 0.0.0.255
 network 20.1.1.0 0.0.0.255
 no auto-summary

!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
mac-address-table static 0007.b400.0202 interface FastEthernet1/1 vlan 20
mac-address-table static 0007.b400.0101 interface FastEthernet1/0 vlan 10
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
banner exec ^C

***************************************************************
This is a normal Router with a SW module inside (NM-16ESW)
It has been preconfigured with hard coded speed and duplex

To create vlans use the command "vlan database" from exec mode
After creating all desired vlans use "exit" to apply the config

To view existing vlans use the command "show vlan-switch brief"

Warning: You are using an old IOS image for this router.
Please update the IOS to enable the "macro" command!
***************************************************************

^C
!
line con 0
 exec-timeout 0 0
 privilege level 15

 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous

line vty 0 4
 login
!
!
end

ESW1 sh glbp bri

Interface   Grp  Fwd Pri State    Address         Active router   Standby router
Vl10        1    -   120 Speak    10.1.1.254      10.1.1.1        unknown
Vl10        1    1   -   Listen   0007.b400.0101  10.1.1.1        -
Vl10        1    2   -   Active   0007.b400.0102  local           -
Vl10        1    3   -   Listen   0007.b400.0103  10.1.1.3        -
Vl20        2    -   100 Listen   20.1.1.254      20.1.1.3        20.1.1.2
Vl20        2    1   -   Listen   0007.b400.0201  20.1.1.3        -
Vl20        2    2   -   Active   0007.b400.0202  local           -
Vl20        2    3   -   Listen   0007.b400.0203  20.1.1.2        -

ESW1 sh glbp

Vlan10 - Group 1
  State is Speak
    3 state changes, last state change 00:00:09
  Virtual IP address is 10.1.1.254
  Hello time 3 sec, hold time 10 sec
    Next hello sent in 2.048 secs
  Redirect time 600 sec, forwarder time-out 14400 sec
  Preemption enabled, min delay 0 sec
  Active is 10.1.1.1, priority 150 (expires in 6.668 sec)
  Standby is unknown
  Priority 120 (configured)
  Weighting 90 (default 100), thresholds: lower 1, upper 100
    Track object 1 state Down decrement 10
  Load balancing: round-robin
  Group members:
    c402.0450.0000 (10.1.1.1)
    c403.25cc.0000 (10.1.1.2) local
    c404.41f0.0000 (10.1.1.3)
  There are 3 forwarders (1 active)
  Forwarder 1
    State is Listen
      2 state changes, last state change 00:00:09
    MAC address is 0007.b400.0101 (learnt)
    Owner ID is c402.0450.0000
    Time to live: 14396.668 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 10.1.1.1 (primary), weighting 110 (expires in 4.772 sec)
  Forwarder 2
    State is Active
      1 state change, last state change 00:58:15
    MAC address is 0007.b400.0102 (default)
    Owner ID is c403.25cc.0000
    Preemption enabled, min delay 30 sec
    Active is local, weighting 90
  Forwarder 3
    State is Listen
      2 state changes, last state change 00:00:11
    MAC address is 0007.b400.0103 (learnt)
    Owner ID is c404.41f0.0000
    Time to live: 14397.532 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec

    Active is 10.1.1.3 (primary), weighting 90 (expires in 7.528 sec)
Vlan20 - Group 2
  State is Listen
  Virtual IP address is 20.1.1.254

  Hello time 3 sec, hold time 10 sec
    Next hello sent in 0.956 secs
  Redirect time 600 sec, forwarder time-out 14400 sec

  Preemption enabled, min delay 0 sec
  Active is 20.1.1.3, priority 150 (expires in 8.900 sec)
  Standby is 20.1.1.2, priority 120 (expires in 9.144 sec)
  Priority 100 (default)
  Weighting 90 (default 100), thresholds: lower 1, upper 100
    Track object 1 state Down decrement 10
  Load balancing: round-robin
  Group members:
    c403.25cc.0000 (20.1.1.1) local
    c404.41f0.0000 (20.1.1.2)

    c405.2914.0000 (20.1.1.3)
  There are 3 forwarders (1 active)
  Forwarder 1
    State is Listen
      4 state changes, last state change 00:00:12
    MAC address is 0007.b400.0201 (learnt)
    Owner ID is c405.2914.0000
    Time to live: 14396.976 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 20.1.1.3 (primary), weighting 110 (expires in 6.972 sec)
  Forwarder 2
    State is Active
      1 state change, last state change 00:58:38
    MAC address is 0007.b400.0202 (default)
    Owner ID is c403.25cc.0000
    Preemption enabled, min delay 30 sec
    Active is local, weighting 90
  Forwarder 3
    State is Listen
      4 state changes, last state change 00:00:14
    MAC address is 0007.b400.0203 (learnt)
    Owner ID is c404.41f0.0000
    Time to live: 14398.416 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 20.1.1.2 (primary), weighting 90 (expires in 8.412 sec)

ESW2

ESW2 sh run

Building configuration...

Current configuration : 3112 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
!
hostname ESW3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
vtp file nvram:vlan.dat


!
!
ip tcp synwait-time 5
!
track 1 interface FastEthernet0/1 line-protocol
! 
!
!
!
!
interface FastEthernet0/0
 description *** Unused for Layer2 EtherSwitch ***
 ip address 3.1.1.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
 switchport access vlan 10
 duplex full
 speed 100
!
interface FastEthernet1/1
 switchport access vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/2
 duplex full
 speed 100
!
interface FastEthernet1/3
 duplex full
 speed 100
!
interface FastEthernet1/4
 duplex full
 speed 100
!
interface FastEthernet1/5
 duplex full
 speed 100
!
interface FastEthernet1/6
 duplex full
 speed 100
!
interface FastEthernet1/7
 duplex full
 speed 100
!
interface FastEthernet1/8
 duplex full
 speed 100
!
interface FastEthernet1/9
 duplex full
 speed 100
!
interface FastEthernet1/10
 duplex full
 speed 100
!
interface FastEthernet1/11
 duplex full
 speed 100
!
interface FastEthernet1/12
 duplex full
 speed 100
!
interface FastEthernet1/13
 duplex full
 speed 100
!
interface FastEthernet1/14
 duplex full
 speed 100
!
interface FastEthernet1/15
 duplex full
 speed 100
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan10
 ip address 10.1.1.3 255.255.255.0
 glbp 1 ip 10.1.1.254
 glbp 1 preempt
 glbp 1 weighting track 1
!
interface Vlan20
 ip address 20.1.1.2 255.255.255.0
 glbp 2 ip 20.1.1.254
 glbp 2 priority 120
 glbp 2 preempt
 glbp 2 weighting track 1
!
router eigrp 1
 network 3.1.1.0 0.0.0.255
 network 10.1.1.0 0.0.0.255
 network 20.1.1.0 0.0.0.255
 no auto-summary

!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
mac-address-table static 0007.b400.0103 interface FastEthernet1/0 vlan 10
mac-address-table static 0007.b400.0203 interface FastEthernet1/1 vlan 20
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
banner exec ^C

***************************************************************
This is a normal Router with a SW module inside (NM-16ESW)
It has been preconfigured with hard coded speed and duplex

To create vlans use the command "vlan database" from exec mode
After creating all desired vlans use "exit" to apply the config

To view existing vlans use the command "show vlan-switch brief"

Warning: You are using an old IOS image for this router.
Please update the IOS to enable the "macro" command!
***************************************************************

^C
!
line con 0
 exec-timeout 0 0
 privilege level 15

 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous

line vty 0 4
 login
!
!
end

ESW2 sh glbp bri

Interface   Grp  Fwd Pri State    Address         Active router   Standby router
Vl10        1    -   100 Listen   10.1.1.254      10.1.1.1        10.1.1.2
Vl10        1    1   -   Listen   0007.b400.0101  10.1.1.1        -
Vl10        1    2   -   Listen   0007.b400.0102  10.1.1.2        -
Vl10        1    3   -   Active   0007.b400.0103  local           -
Vl20        2    -   120 Standby  20.1.1.254      20.1.1.3        local
Vl20        2    1   -   Listen   0007.b400.0201  20.1.1.3        -
Vl20        2    2   -   Listen   0007.b400.0202  20.1.1.1        -
Vl20        2    3   -   Active   0007.b400.0203  local           -

ESW2 sh glbp

Vlan10 - Group 1
  State is Listen
  Virtual IP address is 10.1.1.254
  Hello time 3 sec, hold time 10 sec
    Next hello sent in 1.200 secs
  Redirect time 600 sec, forwarder time-out 14400 sec
  Preemption enabled, min delay 0 sec
  Active is 10.1.1.1, priority 150 (expires in 3.680 sec)
  Standby is 10.1.1.2, priority 120 (expires in 4.820 sec)
  Priority 100 (default)

  Weighting 90 (default 100), thresholds: lower 1, upper 100
    Track object 1 state Down decrement 10
  Load balancing: round-robin
  Group members:
    c402.0450.0000 (10.1.1.1)
    c403.25cc.0000 (10.1.1.2)
    c404.41f0.0000 (10.1.1.3) local
  There are 3 forwarders (1 active)
  Forwarder 1
    State is Listen
    MAC address is 0007.b400.0101 (learnt)
    Owner ID is c402.0450.0000
    Time to live: 14393.680 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 10.1.1.1 (primary), weighting 110 (expires in 3.680 sec)
  Forwarder 2
    State is Listen
    MAC address is 0007.b400.0102 (learnt)
    Owner ID is c403.25cc.0000
    Time to live: 14399.628 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 10.1.1.2 (primary), weighting 90 (expires in 9.624 sec)
  Forwarder 3
    State is Active
      1 state change, last state change 00:58:16
    MAC address is 0007.b400.0103 (default)
    Owner ID is c404.41f0.0000
    Preemption enabled, min delay 30 sec
    Active is local, weighting 90
Vlan20 - Group 2
  State is Standby
    1 state change, last state change 00:58:29
  Virtual IP address is 20.1.1.254
  Hello time 3 sec, hold time 10 sec
    Next hello sent in 1.116 secs
  Redirect time 600 sec, forwarder time-out 14400 sec
  Preemption enabled, min delay 0 sec
  Active is 20.1.1.3, priority 150 (expires in 7.036 sec)
  Standby is local
  Priority 120 (configured)
  Weighting 90 (default 100), thresholds: lower 1, upper 100
    Track object 1 state Down decrement 10

  Load balancing: round-robin
  Group members:
    c403.25cc.0000 (20.1.1.1)
    c404.41f0.0000 (20.1.1.2) local
    c405.2914.0000 (20.1.1.3)
  There are 3 forwarders (1 active)
  Forwarder 1
    State is Listen
    MAC address is 0007.b400.0201 (learnt)
    Owner ID is c405.2914.0000
    Time to live: 14398.172 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 20.1.1.3 (primary), weighting 110 (expires in 8.168 sec)
  Forwarder 2
    State is Listen
    MAC address is 0007.b400.0202 (learnt)
    Owner ID is c403.25cc.0000
    Time to live: 14397.308 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 20.1.1.1 (primary), weighting 90 (expires in 7.304 sec)
  Forwarder 3
    State is Active
      1 state change, last state change 00:58:07
    MAC address is 0007.b400.0203 (default)
    Owner ID is c404.41f0.0000
    Preemption enabled, min delay 30 sec
    Active is local, weighting 90

ESW3

ESW3 sh run

Building configuration...

Current configuration : 2897 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
!
hostname ESW4
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
vtp file nvram:vlan.dat


!
!
ip tcp synwait-time 5
!
track 1 interface FastEthernet0/1 line-protocol
! 
!
!
!
!
interface FastEthernet0/0
 description *** Unused for Layer2 EtherSwitch ***
 ip address 4.1.1.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
 switchport access vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/1
 duplex full
*Mar  1 00:58:43.491: %GLBP-6-FWDSTATECHANGE: Vlan20 Grp 2 Fwd 3 state Listen -> Active
 speed 100
!
interface FastEthernet1/2
 duplex full
 speed 100
!
interface FastEthernet1/3
 duplex full
 speed 100
!
interface FastEthernet1/4
 duplex full
 speed 100
!
interface FastEthernet1/5
 duplex full
 speed 100
!
interface FastEthernet1/6
 duplex full
 speed 100
!
interface FastEthernet1/7
 duplex full
 speed 100
!
interface FastEthernet1/8
 duplex full
 speed 100
!
interface FastEthernet1/9
 duplex full
 speed 100
!
interface FastEthernet1/10
 duplex full
 speed 100
!
interface FastEthernet1/11
 duplex full
 speed 100
!
interface FastEthernet1/12
 duplex full
 speed 100
!
interface FastEthernet1/13
 duplex full
 speed 100
!
interface FastEthernet1/14

 duplex full
 speed 100
!
interface FastEthernet1/15
 duplex full
 speed 100
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan20
 ip address 20.1.1.3 255.255.255.0
 glbp 2 ip 20.1.1.254
 glbp 2 priority 150
 glbp 2 weighting 120 lower 95
 glbp 2 weight
*Mar  1 00:58:45.127: %GLBP-6-FWDSTATECHANGE: Vlan20 Grp 2 Fwd 2 state Listen -> Active
*Mar  1 00:58:46.919: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 20.1.1.2 (Vlan20) is down: holding time expired
*Mar  1 00:58:46.975: %GLBP-6-FWDSTATECHANGE: Vlan20 Grp 2 Fwd 3 state Active -> Listening track 1
 glbp 20 preempt
!
router eigrp 1
 network 4.1.1.0 0.0.0.255
 network 20.1.1.0 0.0.0.255
 no auto-summary
!
ip forward-protocol nd
!
!
no ip http server

no ip http secure-server
!
mac-address-table static 0007.b400.0201 interface FastEthernet1/0 vlan 20
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
banner exec ^C

***************************************************************
This is a normal Router with a SW module inside (NM-16ESW)
It has been preconfigured with hard coded speed and duplex

To create vlans use the command "vlan database" from exec mode
After creating all desired vlans use "exit" to apply the config

To view existing vlans use the command "show vlan-switch brief"

Warning: You are using an old IOS image for this router.
Please update the IOS to enable the "macro" command!
***************************************************************

^C
!
line con 0
 exec-timeout 0 0
 privilege level 15
*Mar  1 00:58:46.995: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 20.1.1.2 (Vlan20) is up: new adjacency
*Mar  1 00:58:48.567: %GLBP-6-FWDSTATECHANGE: Vlan20 Grp 2 Fwd 2 state Active -> Listen
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

ESW3 sh glbp bri

Interface   Grp  Fwd Pri State    Address         Active router   Standby router

Vl20        2    -   150 Active   20.1.1.254      local           20.1.1.2
Vl20        2    1   -   Active   0007.b400.0201  local           -
Vl20        2    2   -   Listen   0007.b400.0202  20.1.1.1        -
Vl20        2    3   -   Listen   0007.b400.0203  20.1.1.2        -
Vl20        20   -   100 Disabled unknown         unknown         unknown

ESW3 sh glbp

Vlan20 - Group 2
  State is Active
    2 state changes, last state change 00:57:55
  Virtual IP address is 20.1.1.254
  Hello time 3 sec, hold time 10 sec
    Next hello sent in 1.464 secs
  Redirect time 600 sec, forwarder time-out 14400 sec
  Preemption disabled
  Active is local
  Standby is 20.1.1.2, priority 120 (expires in 4.984 sec)
  Priority 150 (configured)
  Weighting 110 (configured 120), thresholds: lower 95, upper 120
    Track object 1 state Down decrement 10
  Load balancing: round-robin
  Group members:
    c403.25cc.0000 (20.1.1.1)
    c404.41f0.0000 (20.1.1.2)
    c405.2914.0000 (20.1.1.3) local
  There are 3 forwarders (1 active)
  Forwarder 1
    State is Active
      1 state change, last state change 00:57:15
    MAC address is 0007.b400.0201 (default)
    Owner ID is c405.2914.0000
    Redirection enabled
    Preemption enabled, min delay 30 sec
    Active is local, weighting 110

  Forwarder 2
    State is Listen
      4 state changes, last state change 00:00:05

    MAC address is 0007.b400.0202 (learnt)
    Owner ID is c403.25cc.0000
    Redirection enabled, 594.660 sec remaining (maximum 600 sec)
    Time to live: 14394.660 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 20.1.1.1 (primary), weighting 110 (expires in 4.656 sec)
  Forwarder 3
    State is Listen
      2 state changes, last state change 00:00:06
    MAC address is 0007.b400.0203 (learnt)
    Owner ID is c404.41f0.0000
    Redirection enabled, 599.040 sec remaining (maximum 600 sec)
    Time to live: 14399.036 sec (maximum 14400 sec)
    Preemption enabled, min delay 30 sec
    Active is 20.1.1.2 (primary), weighting 90 (expires in 9.032 sec)

Vlan20 - Group 20
  State is Disabled
  Virtual IP address is unknown
  Hello time 3 sec, hold time 10 sec
  Redirect time 600 sec, forwarder time-out 14400 sec
  Preemption enabled, min delay 0 sec
  Active is unknown
  Standby is unknown
  Priority 100 (default)
  Weighting 100 (default 100), thresholds: lower 1, upper 100
  Load balancing: round-robin
  Group members:
    c405.2914.0000 (20.1.1.3) local

  There are no forwarders

ESW4

ESW4 sh run

Building configuration...

Current configuration : 2821 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
!
hostname ESW5
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip routing
no ip icmp rate-limit unreachable
no ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
vtp file nvram:vlan.dat

!
!
ip tcp synwait-time 5
! 
!
!
!
!
interface FastEthernet0/0
 description *** Unused for Layer2 EtherSwitch ***

 no ip address
 no ip route-cache
 shutdown
 duplex auto
 speed auto
!
interface FastEthernet0/1
 description *** Unused for Layer2 EtherSwitch ***
 no ip address
 no ip route-cache

 shutdown
 duplex auto
 speed auto
!
interface FastEthernet1/0
 switchport access vlan 10

 duplex full
 speed 100
!
interface FastEthernet1/1
 switchport access vlan 10
 duplex full
 speed 100
!
interface FastEthernet1/2
 switchport access vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/3
 switchport access vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/4
 duplex full
 speed 100
!
interface FastEthernet1/5
 duplex full
 speed 100
!
interface FastEthernet1/6
 duplex full
 speed 100
!
interface FastEthernet1/7
 duplex full
 speed 100
!
interface FastEthernet1/8
 duplex full
 speed 100
!
interface FastEthernet1/9
 duplex full
 speed 100
!
interface FastEthernet1/10
 switchport access vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/11
 switchport access vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/12
 switchport access vlan 20
 duplex full
 speed 100
!
interface FastEthernet1/13
 switchport access vlan 10
 duplex full
 speed 100
!
interface FastEthernet1/14
 switchport access vlan 10
 duplex full
 speed 100
!
interface FastEthernet1/15

 switchport access vlan 10
 duplex full
 speed 100
!
interface Vlan1
 no ip address
 no ip route-cache
 shutdown
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
banner exec ^C

***************************************************************
This is a normal Router with a SW module inside (NM-16ESW)
It has been preconfigured with hard coded speed and duplex

To create vlans use the command "vlan database" from exec mode
After creating all desired vlans use "exit" to apply the config

To view existing vlans use the command "show vlan-switch brief"

Warning: You are using an old IOS image for this router.
Please update the IOS to enable the "macro" command!
***************************************************************

^C
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous

line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

ESW4 sh glbp bri

ESW4 sh glbp

 

GLBP 패킷

 

GLBP 프로토콜 패킷

GLBP Hello, Requst/Response?