Short answer would be not unless the volume of data was a problem or the new configuration caused packets to be switched(proccess, ...) in a different manner than before.
I think you want to do: int fa0/0 ip addr 205.109.29.x(where x is >128) 255.255.255.128 ip addr 205.109.29.33 255.255.255.224 sec If you are trying to keep x below 128 then you've got a problem with the subnet mask's being different. Not a problem for the router, but a problem for the end hosts the router sends icmp redirects to which have different subnet masks. Assuming no other routers attached to this the L2 network of this fa0/0 this just Disable icmp re-directs and also seriously consider ip route-cache same-interface. If you want to run a trunking protocol and have the two networks on different sub interfaces then you'll have to straighten out any overlapping net blocks. By abstracting X for us you really made it difficult to help. Showing the .29. as an X if you wanted to hide addresses would have been better. Good Luck and hope this helps, Darrell ""McHugh Randy"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > All, > Does anyone know if using a seconday interface on fast ethernet 0/0 on a > 7204 will degrade perfomance on the network for the primary interface? I > have to route a a different subnet on a LAN and cannot do it without > creating a secondary interace? > > for instance > interface FastEthernet0/0 > ip address 205.109.29.x 255.255.255.128 > no ip route-cache > no ip mroute-cache > full-duplex > no cdp enable > interface FastEthernet0/0.1 > ip add 205.109.29.33 255.255.255.224 > > to add a second subnet to this router for that LAN > > Will this degrade performance or cause a problem. > > There is probably a beter way to do it but I the router will not let me > create a static route for this subnet becuase the gateway is the router > itself. > for instance > > > Enter configuration commands, one per line. End with CNTL/Z. > AAAV7204(config)#ip route 205.109.29.32 255.255.255.224 205.109.29.129 > %Invalid next hop address (it's this router) > AAAV7204(config)# > > Thanks, > Randy Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=52304&t=52295 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
