From: Uchil Perera (uchil.groupstudy@yahoo.com)
Date: Sun Feb 25 2007 - 14:21:34 ART
Hi GS,
Can somebody explain how circuit-group load balancing work.
I did the below config accourding to DOC CD, but in spanning tree it shows the second link (Serial 1) blocked. How does it load balance ?
R1#sh run
Building configuration...
Current configuration : 1028 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$0WsJ$97HhfhZfeg5x0uKOZBspU0
!
no aaa new-model
ip subnet-zero
!
frame-relay switching
!
bridge irb
!
!
interface Loopback0
ip address 3.3.1.1 255.255.255.0
!
interface Ethernet0
no ip address
no keepalive
bridge-group 1
!
interface Ethernet0.10
!
interface Serial0
no ip address
clock rate 2000000
no fair-queue
bridge-group 1
bridge-group 1 circuit-group 1
!
interface Serial1
no ip address
clock rate 2000000
bridge-group 1
bridge-group 1 circuit-group 1
!
interface BVI1
ip address 3.3.20.1 255.255.255.0
!
router ospf 1
router-id 3.3.1.1
log-adjacency-changes
network 3.3.20.1 0.0.0.0 area 0
!
ip http server
ip classless
!
!
!
bridge 1 protocol ieee
bridge 1 route ip
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
exec-timeout 0 0
password cisco
logging synchronous
login
!
end
R2
hostname R2
!
!
ip subnet-zero
!
!
bridge irb
!
!
hub ether 0 1
link-test
auto-polarity
!
hub ether 0 2
link-test
auto-polarity
!
hub ether 0 3
link-test
auto-polarity
!
hub ether 0 4
link-test
auto-polarity
!
hub ether 0 5
link-test
auto-polarity
!
hub ether 0 6
link-test
auto-polarity
!
hub ether 0 7
link-test
auto-polarity
!
hub ether 0 8
link-test
auto-polarity
!
hub ether 0 9
link-test
auto-polarity
!
hub ether 0 10
link-test
auto-polarity
!
hub ether 0 11
link-test
auto-polarity
!
hub ether 0 12
link-test
auto-polarity
!
hub ether 0 13
link-test
auto-polarity
!
hub ether 0 14
link-test
auto-polarity
!
hub ether 0 15
link-test
auto-polarity
!
hub ether 0 16
link-test
auto-polarity
!
interface Loopback0
ip address 3.3.2.2 255.255.255.0
!
interface Ethernet0
no ip address
bridge-group 1
!
interface Ethernet0.10
!
interface Serial0
no ip address
no fair-queue
bridge-group 1
bridge-group 1 circuit-group 1
!
interface Serial1
no ip address
bridge-group 1
bridge-group 1 circuit-group 1
!
interface BVI1
ip address 3.3.20.2 255.255.255.0
!
ip classless
ip http server
!
!
bridge 1 protocol ieee
bridge 1 route ip
bridge 1 priority 0
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
exec-timeout 0 0
password cisco
logging synchronous
login
!
end
R2#
R1#sh span br
Bridge group 1
Spanning tree enabled protocol ieee
Root ID Priority 0
Address 0050.547f.d0e6
Cost 647
Port 3 (Serial0)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address 0000.0c3e.a523
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
Ethernet0 128.2 128 100 FWD 647 32768 0000.0c3e.a523 128.2
Serial0 128.3 128 647 FWD 0 0 0050.547f.d0e6 128.3
Serial1 128.4 128 647 BLK 0 0 0050.547f.d0e6 128.4
R2#sh span brief
Bridge group 1
Spanning tree enabled protocol ieee
Root ID Priority 0
Address 0050.547f.d0e6
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 0
Address 0050.547f.d0e6
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Designated
Name Port ID Prio Cost Sts Cost Bridge ID Port ID
-------------------- ------- ---- ----- --- ----- -------------------- -------
Ethernet0 128.2 128 100 FWD 0 0 0050.547f.d0e6 128.2
Serial0 128.3 128 647 FWD 0 0 0050.547f.d0e6 128.3
Serial1 128.4 128 647 FWD 0 0 0050.547f.d0e6 128.4
R2#
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This archive was generated by hypermail 2.1.4 : Thu Mar 01 2007 - 07:38:48 ART