[c-nsp] HSRP Packet Duplication

[Alexandra Alvarado]

Hello,

I don't have any ACL with logs keyword.  Additionally the 7200vxr has
NPE-G2, I test a new IOS 12.4(4)XD2 but the same results.

I have in the same VLAN 1, 2 HSRP groups and 1 GLPB group. Each HSRP group
is managed with a different couple of 7500 routers Version 12.0(31)S5 and
the GLBP group use a third couple of 7500 routers Version 12.3(16a).  The
common in these 6 routers is that all these have IP address with a common
subnet mask. Example:

GROUP HSRP 100
roA -> 10.10.10.1/24
roB -> 10.10.10.2/24
hsrp -> 10.10.10.3

GROUP HSRP 150
roC -> 10.10.10.4/24
roD -> 10.10.10.5/24
hsrp -> 10.10.10.6

GROUP GLBP 1
roE -> 10.10.10.7/24
roF -> 10.10.10.8/24
glbp -> 10.10.10.9

This configuration is running now in the network without any problem but
when I insert the 7200vxr NPE-G2 with:

GROUP HSRP 11
roG -> 10.10.10.10/24
roH -> 10.10.10.11/24
hsrp -> 10.10.10.12

The packet duplication appears.


Thanks


A.A.A.A.


-----Original Message-----
From: Ash Garg [mailto:ash at telstra.net] 
Sent: Thursday, May 24, 2007 8:49 PM
To: 'Alexandra Alvarado'; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] HSRP Packet Duplication

Hi, do you have an access list on the inbound interface with the "log"
keyword?



Ash


-----Original Message-----
From: matt at iseek.com.au [mailto:matt at iseek.com.au] 
Sent: Thursday, May 24, 2007 7:25 PM
To: Alexandra Alvarado
Subject: Re: [c-nsp] HSRP Packet Duplication

hey alexandra,

probably doesnt help much but i have a variety of npe-g1 and catalyst 6500 
working just fine with hsrp, im running 12.2(18)SXF on the cat6k and a 
combo of 12.4(13a) enterprise/iponly and 12.2(25)S5 on the g1's.

what does a packet sniffer say?

--matt


-----Original Message-----
From: Alexandra Alvarado [mailto:aaaa at telconet.net] 
Sent: Thursday, May 24, 2007 5:13 PM
To: cisco-nsp at puck.nether.net; 'Alexandra Alvarado'
Subject: HSRP Packet Duplication

Hello,


I have trying to insert a couple of cisco 7206VXR NPE-GE with HSRP connected
to a CATALYST 6500 SUP720.

At first I tried with IOS 12.2(31) SB3X and next with 12.2(31) SB5 IOS but
without success because after a random time I got packet duplication:

64 bytes from 200.110.67.33: icmp_seq=499 ttl=253 time=9.00 ms (DUP!)
64 bytes from 200.110.67.33: icmp_seq=499 ttl=253 time=9.33 ms (DUP!)
64 bytes from 200.110.67.33: icmp_seq=499 ttl=253 time=9.54 ms (DUP!)
64 bytes from 200.110.67.33: icmp_seq=499 ttl=253 time=9.57 ms (DUP!)
64 bytes from 200.110.67.33: icmp_seq=499 ttl=253 time=9.95 ms (DUP!)
64 bytes from 200.110.67.33: icmp_seq=499 ttl=253 time=9.99 ms (DUP!)
64 bytes from 200.110.67.33: icmp_seq=499 ttl=253 time=10.6 ms (DUP!)
64 bytes from 200.110.67.33: icmp_seq=499 ttl=253 time=10.6 ms (DUP!)
64 bytes from 200.110.67.33: icmp_seq=500 ttl=253 time=2.07 ms
64 bytes from 200.110.67.33: icmp_seq=500 ttl=253 time=2.11 ms (DUP!)

I tried to simulate the problem in a Lab but all seemed ok.  Additionally I
read an http page, it detailed a similar problem:
http://web.nether.net/lists/cisco-nsp/7123.html where the possible solutions
were:

- Disable CEF
- Remove HSRP
- Use IOS 12.0S train

But I cannot apply any of these solutions because I need CEF and HSRP and
there is no IOS 12.0S for NPE-G2


Thanks


A.A.A.A.