Reflexive ACL

From: Suryakant P (suryakant.pandian@gmail.com)
Date: Mon May 26 2008 - 10:38:05 ART


Hi All,

I have two routers connected to a common ethernet segment.

r1(204.12.1.4)f0/0----f0/1r2(204.12.1.254)

I have configured reflexive acl on the r1 router.

interface FastEthernet0/0
 ip address 204.12.1.4 255.255.255.0
 ip access-group inbound in
 ip access-group outbound out
 duplex auto
 speed auto

ip access-list extended inbound
 permit udp any any eq rip
 permit tcp any any eq bgp
 permit tcp any eq bgp any
 permit icmp any any echo-reply
 permit tcp any eq telnet any
 evaluate RETURN
ip access-list extended outbound
 permit icmp any any reflect RETURN
 permit udp any any reflect RETURN
 permit tcp any any reflect RETURN

With this configuration,I was not able to ping r1's own interface.

Rack1R4#ping 204.12.1.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 204.12.1.4, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Rack1R4#

I understand that ,reflexive acl does not act on the traffic generated by
the router itself.That could be reason for the ping failure

ip access-list extended originated
 permit icmp host 204.12.1.4 any

route-map local-traffic permit 10
 match ip address originated
 set interface Loopback0

ip local policy route-map local-traffic

Even with these changes ,I was not able to ping 204.12.1.4.

Is this something to do with the way packet reaches that interface or am I
missing anything here?

Thanks
With regards
Suryakant



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