04-09-2010 02:53 AM - edited 03-04-2019 08:05 AM
Hi all
I have 2 internet routers on site by a ISP, I have noticed that the main interfaces on both routers are in the same subnet, as per normal, and there is a group with a virtual address in this subnet as I would expect. However there is another group configured on the same interface where the standby IP address is not in the same subnet as the real address! , Will this really work?
Many thanks
Carl
Solved! Go to Solution.
04-12-2010 05:39 AM
You may use sub interface to achieve the same result... as thre are couple of limitations while particip
ating in dynamic routing protocol like OSPF.
If you are not planning to use OSPF in near future then you can continue with the configuration currently available...
Cheers!
04-09-2010 06:12 AM
HI,
Please post the config
Thanks
Laurent.
04-09-2010 06:46 AM
Basically one ip is 194.73.x.x and the other 194.74.x.x but the masks are /28
cheers
#sh standby
FastEthernet0 - Group 1
State is Active
37 state changes, last state change 4w1d
Virtual IP address is 194.73.x.x
Active virtual MAC address is 0000.0c07.xxxx
Local virtual MAC address is 0000.0c07.xxxx (default)
Hello time 3 sec, hold time 8 sec
Next hello sent in 1.868 secs
Authentication text "xxxx"
Preemption enabled
Active router is local
Standby router is 194.74.x.x, priority 100 (expires in 7.868 sec)
Priority 150 (configured 150)
Track interface Serial0:0.1 state Up decrement 100
IP redundancy name is "xxx" (default) FastEthernet0 - Group 2
State is Standby
59 state changes, last state change 3w1d
Virtual IP address is 194.74.x.x
Active virtual MAC address is 0000.0c07.xxxx
Local virtual MAC address is 0000.0c07.xxxx (default)
Hello time 3 sec, hold time 8 sec
Next hello sent in 0.488 secs
Authentication text "xxxx"
Preemption enabled
Active router is 194.74.x.x, priority 150 (expires in 6.484 sec)
Standby router is local
Priority 100 (default 100)
IP redundancy name is "xxx" (default) xxxx-Pri#
FAILOVER
xxxx#sh ip int brie
Interface IP-Address OK? Method Status Protocol
FastEthernet0 194.74.x.x YES NVRAM up up
Serial0:0 unassigned YES NVRAM up up
Serial0:0.1 x.x.x.x YES NVRAM up up
#sh standby
FastEthernet0 - Group 1
State is Standby
42 state changes, last state change 4w1d
Virtual IP address is 194.73.x.x
Active virtual MAC address is 0000.0c07.xxxx
Local virtual MAC address is 0000.0c07.xxxx (default)
Hello time 3 sec, hold time 8 sec
Next hello sent in 0.620 secs
Authentication text "xxxx"
Preemption enabled
Active router is 194.73.x.x, priority 150 (expires in 7.628 sec)
Standby router is local
Priority 100 (default 100)
IP redundancy name is "xxxx" (default) FastEthernet0 - Group 2
State is Active
60 state changes, last state change 3w1d
Virtual IP address is 194.74.x.x
Active virtual MAC address is 0000.0c07.xxxx
Local virtual MAC address is 0000.0c07.xxxx (default)
Hello time 3 sec, hold time 8 sec
Next hello sent in 0.612 secs
Authentication text "xxxx"
Preemption enabled
Active router is local
Standby router is 194.73.x.x, priority 100 (expires in 6.688 sec)
Priority 150 (configured 150)
Track interface Serial0:0.1 state Up decrement 100
04-09-2010 07:42 AM
I believe you are having two subnets
1. Subnet A - 194.73.x.x - Active router is A and standby is B
2.Subnet B - 194.74.x.x - Active router is B and standby is A
Should work from the HSRP output pasted..
With regards,
Shailesh Hardas
04-09-2010 07:56 AM
You have two HSRP groups configured one for each subnet so you should have secondary addresses configured on your interfaces.
Is it working as expected ?
Laurent.
04-12-2010 05:35 AM
hi
yes it seems to be...so they must have secondary addresses on there??
i gather these dont show in ip int bri command??
cheers
Carl
04-12-2010 05:39 AM
You may use sub interface to achieve the same result... as thre are couple of limitations while particip
ating in dynamic routing protocol like OSPF.
If you are not planning to use OSPF in near future then you can continue with the configuration currently available...
Cheers!
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