• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 942
  • Last Modified:

ICMP Redirects on Network

We have several remote offices connected to the HQ via PIX to PIX L2L Ipsec tunnels.

The remote offices are reporting performance issues.  For diagnostics, I am using hrping.

During pings, I am getting a large number of ICMP Redirects

C:\Documents and Settings\hannibal>hrping pvl
This is hrPING v2.34 by cFos Software GmbH -- http://www.cfos.de

Pinging pvl [10.1.4.1]
with 64 bytes data (92 bytes IP):

Reply from 10.1.4.1: seq=0000 time=21.667ms TTL=128 ID=a97d
Reply from 10.1.4.1: seq=0001 time=21.583ms TTL=128 ID=a97f
Reply from 10.1.13.199: redirect for network; seq=0002 time=0.460ms
Reply from 10.1.4.1: seq=0003 time=21.449ms TTL=128 ID=a981

Sometimes redirects represent 50-70% of results.

The network is pretty simple.  10.1.13.199 is the gateway L3 switch (Cisco 3550-48 L3).  It's default gateway is a PIX 506e (6.3(5)).  The PIX does an IPSec VPN.  The outside of the PIX connects with a 2611, connected to a T1.

No dual gateways or anything that could be causing ICMP Redirects.

Any ideas why I am seeing this?
0
RPPreacher
Asked:
RPPreacher
1 Solution
 
Kamran ArshadIT AssociateCommented:
0
 
RPPreacherAuthor Commented:
No help at all.  And RTFM is not an appropriate expert exchange answer.
0
 
jaredcallCommented:
When a router sends a network redirect, it is essentially saying "you shouldn't use me as as a router to get there.  Use this other router instead."

These can be sent by a node that's not a router, but other nodes have configured as their default gateway.

-jared
0
 
rsivanandanCommented:
RPPreacher,

 Would be it possible for a quick ascii diagram  with ip addresses ? IP redirects aren't bad, but without seeing the network we can decide if we can turn it off or not.

Cheers,
Rajesh
0
 
RPPreacherAuthor Commented:
Per TAC, we turned off ICMP redirects.
Resolved.
0

Featured Post

[Webinar] Kill tickets & tabs using PowerShell

Are you tired of cycling through the same browser tabs everyday to close the same repetitive tickets? In this webinar JumpCloud will show how you can leverage RESTful APIs to build your own PowerShell modules to kill tickets & tabs using the PowerShell command Invoke-RestMethod.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now