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SubjectRe: kernel not processing ICMP Redirects
-----BEGIN PGP SIGNED MESSAGE----- (Matthew S. Crocker) writes:
| My linux box (actually several of them) which are running 2.0.22 &
| 2.0.23 (redhat 3.0.3) are not processing ICMP redirects from my cisco
| 2501.

Are you sure?

I'm not really familiar with the routing code in the current kernel,
so someone may yet correct me. However, judging from the 2.0.24
source, recent kernels *only* store ICMP redirects in the route cache,
not in the routing tables.

As far as I know, there's no standard utility to view the route cache,
but you can "cat /proc/net/rt_cache". Any routes with the RTF_DYNAMIC
bit (0x10) set in "flags" are the result of a redirect.

Even though these entries won't appear in the routing table, they'll
still be used.

Kevin <>

Version: 2.6.3
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Comment: Processed by Mailcrypt 3.4, an Emacs/PGP interface


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