Configuring Ethernet Sub-Interface on a Cisco 2503?
Hello there, We currently peer to 2 providers. We have several SubNets of I.P's from them. Currently the Ethernet0 Interface of our Cisco Router handles all the I.P. Addresses. I was wondering if somebody here could advise me on how to create separate Sub-Interfaces for theses like we have with the Serial Interfaces. Our Ethernet Interface looks slightly like this at the moment: interface Ethernet0 description CISCO ROUTER ip address x.x.x.x x.x.x.x ip address x.x.x.x x.x.x.x secondary ip address x.x.x.x x.x.x.x secondary no ip directed-broadcast I wish to split these up into 3 Sub-Interfaces. That way, it'll make it far easier to Graph Bandwith etc. Regards, Sahil Gupta NET4U Limited ------------------------------------ NET4U -- www.net4u.co.nz Home of the new - $24.95 128k ADSL Nationwide Internet Service Provider ------------------------------------ - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog
On Sat, Jan 19, 2002 at 12:45:08AM +0000, Sahil Gupta - NET4U wrote: We currently peer to 2 providers. We have several SubNets of I.P's from them. Currently the Ethernet0 Interface of our Cisco Router handles all the I.P. Addresses. I was wondering if somebody here could advise me on how to create separate Sub-Interfaces for theses like we have with the Serial Interfaces. If I understand this correctly, you have n subnets, (presumably non-adjacent?) which are all connected to the same interface on a cisco router and you wish to make the cisco see them as separate interfaces. The answer probably is that you can't --- you can have Ethernets sub-interfaces for dot1q and ISL aware interfaces, and multiplex it out over a switch fabric, but for your situation its a bit of a mess. Also, I assume if a machine lives in one subnet, it uses same-interface routing to get to another even though they reside in the same layer-2 network? If so, you might want to stop doing this as it causes unnecessary traffic and load on your cisco. --cw - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog
On Sat, Jan 19, 2002 at 01:34:58AM +1300, Chris Wedgwood wrote:
The answer probably is that you can't --- you can have Ethernets sub-interfaces for dot1q and ISL aware interfaces, and multiplex it out over a switch fabric, but for your situation its a bit of a mess.
More fundamentally, there is no dot1q or isl encaps support on the 2503. - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog
participants (3)
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Chris Wedgwood -
Joe Abley -
Sahil Gupta - NET4U