Greetings,

Have a pair of Nokia 650's w/VRRP running on the outside of our site purely to 
terminate VPN tunnels with partner companies.  They are configured "on a stick", i.e. 
the encrypted traffic enters the public interface, gets decrypted, and leaves the 
public interface again, headed towards the PIX that actually protects the application 
segment.

I noticed this morning that there is a flood of ICMP redirects streaming out of both 
Nokias.  It appears that for every packet coming out of our application segment 
destined for something on the other side of a tunnel a redirect is sent from the Nokia 
to the app server, asking it to use the border router instead.  Now the border router 
is the default gateway for the Nokias and also for the PIX.  It makes some sense that 
the Nokia would complain about being "in the middle", and if the traffic was not meant 
for a tunnel it would be a needless hop.  I would assume that if I could make some 
static route entries for the destinations on the other side of the tunnels I could 
squelch this redirect flood, but because it is "on a stick" I don't have another 
interface to direct the traffic to!

Despite all of this the traffic DOES enter the tunnel as intended, and the application 
is operating normally (other than complaints about it being slow, which is what began 
the investigation this morning that uncovered the redirects).

First I am wondering if this is a normal artifact of configuring this to run "on a 
stick", and second I am wondering if it is possible that these redirects are slowing 
down the traffic in any way.  Finally I would love to hear from someone that has 
solved this :)

Any ideas?

Thanks,

Jeff LaCoursiere
Infrastructure Specialist
T-Mobile International UK

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