From: Robin Johnson (Rob.Johnson@dxi.net)
Date: Sat Jul 09 2005 - 10:33:34 GMT-3
Ive just lab this up
check out the link and then add a new acl and debug the acl whilst
tracerouting
Everything should become crystal:-)
http://www.cisco.com/warp/public/63/ping_traceroute.html#traceroute
Hint (your missing an important protocol in yr acl) as well as policy map on
the interface
Side not to Sila - Packets are policy routed that are generated locally if
you use the ip local policy command!
HTH
Rob
-----Original Message-----
From: Varthis Vassilantonakis [mailto:vvas@altec.gr]
Sent: 09 July 2005 11:45
To: ccielab@groupstudy.com
Subject: Traceroute and policy based routing
Hello group,
One quite tricky question.
In the IEWB Lab 18 Q12.1 there is an example on how we should configure a
router to response with its Loopback address when any other router issue a
traceroute to it.
What if we want to do something slightly different.
What I want is to traceroute from R1 to R5.
R2 has 2 possible ways to reach R5. These are R3 and R4. See the diagram
below:
R1 ------- R2 ------------------R3-----------------
| |
| |
| |
R4--------------------------------------R5
I want this traceroute to go through R4 and not through R3.
My configuration is the following:
R2:
ip local policy route-map test
!
route-map test permit 10
match ip address 100
set ip next-hop <R4-address connected to R2>
!
access-list 100 permit icmp any any time-exceeded
access-list 100 permit icmp any any port-unreachable
Local policy routing is configured because traceroute is locally generated
by the router each time.
However, I can not get this to work.
Any ideas ?
TIA
Varthis
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