06-22-2007 05:33 AM - edited 03-05-2019 04:54 PM
Hi All,
Can I route traffic on either a layer 3 device whilst being selective about the destination port ??
I have been asked if I can route all MSN Messenger traffic via another ISP route (rather than blocking it altogether), freeing up valuable bandwidth on our main web link.
I think that the port is 1863 for MSN ? is there a way of doing this ??
Cheers,
Stuart
06-22-2007 05:46 AM
You need to implement Policy Based Routing and apply it at the ingress interface of the L3 device.
Your PBR would look like this:
ip access-list extended MSN
permit tcp any any eq 1863
route-map MSN permit 10
match ip address MSN
set ip next-hop [ISP next hop]
[ingress interface]
interface f0/0
ip policy route-map MSN
06-24-2007 07:20 AM
Hi EdisonOrtiz,
Many thanks for your reply.
I've tried implementing this onto both a 3750 & 3560 switch but to no avail. I don't seem to be able to input the 'IP POLICY ROUTE-MAP MSN' statement into the desired interface, it just display's unrecognised command. So, I tried implementing it into the VLAN interface which is accepted but then I see no traffic matching the access-list.
I must be doing something silly here ...
Stu
06-24-2007 10:19 AM
You need to change the SDM in the switch to sdm prefer routing and then reboot.
06-24-2007 11:51 AM
Edsion is correct.
By default the switch run the default sdm template which does not support policy based routing.
Have a look at this link
HTH, rate if it does
Narayan
06-25-2007 07:39 AM
I changed the SDM template and reloaded the switch (3750) but it still won't take the ip policy route-map statement at the required interface ??
Any ideas ?
06-25-2007 07:48 AM
Which image are you running on the switch,
ipbase or IP services?
Can you post sh ver and sh runn
Narayan
06-25-2007 10:10 AM
The policy-based routing can only be applied on routed interfaces. If you are trying to apply it on a L2 switchport interface, it won't work. You need to apply at the SVI (Switch Virtual Interface) of the respective VLAN.
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