High Latency after configuring HSRP

[ucleasing]

Hi All,

last weekend i configured HSRP on our default gateway(Cisco 2600) and now i have the problem that the latency is constantly at 3ms and from time to time it goes up to 10 ms. Is that something i should have expected or is there someting wrong with my configuration? The standby ip adresses are the same adresses as the router interfaces had before and the CPU utilization is at 10 % so i do not know what happend here. I atached the config file so if you need further information i will gladly provid it. I hope that someone can give me a advice for this problem.

Thanks

Sebastian

[Latchum Naidu]

Hi,

Please configure the HSRP like below as per best practices and see...

ON PRIMARY:
interface FastEthernet0/1
ip address 111.111.111.5 255.255.255.0
speed 100
full-duplex
standby use-bia scope interface
standby 0 ip 111.111.111.4
standby 0 priority 110
standby 0 preempt
standby 0 authentication ************
standby 0 track FastEthernet0/0 30

ON SECONDARY:

interface FastEthernet0/0
ip address 111.111.111.6 255.255.255.0
speed 100
full-duplex
standby use-bia scope interface
standby 0 ip 111.111.111.4
standby 0 priority 90
standby 0 authentication *************
standby 0 track FastEthernet0/1 30

Hope this clear you.

Please click on the correct answer if this answered your question.
Regards,
Naidu.

[ucleasing]

Hi,

thanks for your fast reply. And i noticed that i forgot to mention a very important point for this configuration. The Router is connecting 2 of our Networksegments and i want a standby Router to takeover if the first Router goes offline.

If i get this right your configuration is for a standby interface on the router. Do you know the best practice for my case too or can you tell me where you found it?

Regards,

Sebastian Nöcker

[Latchum Naidu]

Hi,

As long as the HSRP provide Gateway redundancy for LAN devices the configuration which i provided in my previous post is enough.

For your scenario as you have two wan link on one router try to choose the both two wan interfaces and configure the HSRP example in my previous post.

Hope this clear you.

Please click on the correct answer if this answered your question.
Regards,
Naidu.

[ucleasing]

Sorry

but i think we are still not on the same point. I have not one but two Routers wich are connected to the same 2 LANs. LAN 1 has the 111.111.111.4 as default gateway adress and LAN 2 has 222.222.222.100 or 222.222.222.99 as default gateway adress. And if Router 1 goes offline because of hardware failure or anything else i want that Router 2 takes over. I changed the HSRP configuration of both router to this:

Router 1 - Fa 0/0                                                                 Router 2 - Fa 0/0

standby use-bia scope interface                                             standby use-bia scope interface

standby 100 ip 111.111.111.4                                                standby 100 ip 111.111.111.4

standby 100 priority 110                                                        standby 100 priority 90
standby 100 preempt                                                            standby 100 preempt

standby 100 authentication STRING1                                    standby 100 authentication STRING1

Router 1 - Fa 0/1                                                                 Router 2 - Fa 0/1

standby use-bia scope interface                                             standby use-bia scope interface

standby 200 ip 222.222.222.100                                             standby 200 ip 222.222.222.100
standby 200 ip 222.222.222.99 secondary                               standby 200 ip 222.222.222.99 secondary
standby 200 priority 110                                                         standby 200 priority 90
standby 200 preempt                                                             standby 200 preempt

standby 200 authentication STRING2                                    standby 100 authentication STRING2

Now it is a little better. The latency is most times at 1-2ms but it still has times when the latency goes for multiple packets up to 9ms and higher.