[nsp] weird gre tunnel...

[Gert Doering]

Hi,

On Mon, Apr 19, 2004 at 12:34:42AM -0400, James wrote:
> And I found out that when you turn OFF cef on the Cisco, the TTL problem
> with the gre tunnel immediately goes away, and the hidden hop in the
> traceroute now shows up as expected.. So it appears cef implementation
> on the IOS versions I tried (12.0.25S1 on 7500, 12.2(17a) on 2610) has a
> bug or anamolgy that causes it to not decrement the TTL on gre tunnels..

ACK.  It's some generic CEF-over-Tunnel thing that also bites IPv6
tunnels (12.2(14)S3 and 12.3(6)).  One key issue seems to be a media
change "ingress tunnel, egress native" or vice versa.

Don't have a specific bug id, though.

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
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