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New Member

HSRP problem

I have two 837s running HSRP. Both routers are connected to a 2960.

Router_1:

interface Ethernet0

ip address 192.168.0.2 255.255.255.0

no ip redirects

standby 1 ip 192.168.0.1

standby 1 timers 254 255

standby 1 priority 111

standby 1 preempt

hold-queue 100 out

Router_2:

interface Ethernet0

ip address 192.168.0.3 255.255.255.0

no ip redirects

standby 1 ip 192.168.0.1

standby 1 timers 254 255

standby 1 priority 222

standby 1 preempt

hold-queue 100 out

I have noticed the following:

A) when I ping from Router_2 to the Switch all the packets come back fine BESIDES when I the Router is receiving HSRP messages. This is causing the Router loose one packet and that is why I have modified the Standby timer to send as little as possilbe...i.e.

Router_2#ping 192.168.0.4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.4, timeout is 2 seconds:

*Apr 4 22:49:18.774: HSRP: Et0 Grp 1 Hello out 192.168.0.3 Active pri 222 vIP 192.168.0.1

*Apr 4 22:49:19.790: HSRP: Et0 Grp 1 Hello in 192.168.0.2 Standby pri 111 vIP 192.168.0.1.!!!!

Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms

_______________________________________

The same happens when this message is received, but I don't quite understand what the message is about

Router_2#ping 192.168.0.4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.4, timeout is 2 seconds:

*Apr 4 22:49:08.338: HSRP: Et0 REDIRECT adv in, Passive, active 0, passive 1, from 192.168.0.2.!!!!

Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/4 ms

____________________________________

in both cases I don't understand why these messages are affecting my pinging???

B) when I ping from the Switch to the virtual ip address the results are totally random...

Switch#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

.....

Success rate is 0 percent (0/5)

Switch#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

.!!!!

Success rate is 80 percent (4/5), round-trip min/avg/max = 1/2/8 ms

Switch#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

....!

Success rate is 20 percent (1/5), round-trip min/avg/max = 1/1/1 ms

Switch#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/8 ms

Switch#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

....!

Success rate is 20 percent (1/5), round-trip min/avg/max = 1/1/1 ms

Switch#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

01:04:31: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending

01:04:31: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending full packet.

01:04:33: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending

01:04:33: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending full packet.

01:04:35: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending

01:04:35: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending full packet.

01:04:37: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending

01:04:37: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending full packet.!

Success rate is 20 percent (1/5), round-trip min/avg/max = 1/1/1 ms

01:04:39: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending

01:04:39: IP: s=192.168.0.4 (local), d=192.168.0.1 (Vlan1), len 100, sending full packet

01:04:39: IP: s=192.168.0.1 (Vlan1), d=192.168.0.4, len 100, rcvd 1

any ideas on what is happening???

thank you

  • Other Network Infrastructure Subjects
1 REPLY
New Member

Re: HSRP problem

I think I have solved the problem....

All the way along it seemed that it was the Switch who was getting confused when trying to forward the packets due to the fact that both routers were using the same virtual MAC address...so I've added the "standby use-bia" command on one of the routers so that one of them gets the "burnt-in" MAC address...this seems to have solved all the problems even after setting the timers back to 5 15

I hope this will help someone else too... cheers

Router_2:

interface Ethernet0

ip address 192.168.0.3 255.255.255.0

no ip redirects

no cdp enable

standby use-bia

standby 1 ip 192.168.0.1

standby 1 timers 5 15

standby 1 priority 222

standby 1 preempt

hold-queue 100 out

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