nanog mailing list archives
Re: two interfaces one subnet
From: "Patrick W. Gilmore" <patrick () ianai net>
Date: Mon, 11 May 2009 17:47:43 -0400
On May 11, 2009, at 5:19 PM, Alex H. Ryu wrote:
Unless you configure Layer 2 for two interfaces, it's not going to work.
It can work. Of course it _may_ not, depending upon your implementation, but then some implementations can't get a single interface to work properly per subnet.
It is invalid from networking principle.
You are confused, there is nothing invalid about the configuration.
If you have to send the traffic for host in same subnet you configured,which interface it should send out ?
Pick an interface and send the packet. It's not rocket science. I can come up with half a dozen algorithms off the top of my head while typing the last sentence.
Basically it may create broadcast storm loop by putting two ip addressesin same subnet in different interface.
That is an interesting statement. Could you explain how this can happen without crafting an idiotic implementation spec (e.g. every packet goes out both interfaces)?
It may be allowed from host-level, but from router equipment, I don't think it was allowed at all.
Ever used HSRP / VRRP? Two interfaces in the same subnet. Works fine. In fact, most people think it works _better_ than one interface in the same subnet.
-- TTFN, patrick
Current thread:
- Re: two interfaces one subnet, (continued)
- Re: two interfaces one subnet Duane Waddle (May 11)
- Re: two interfaces one subnet Daryl G. Jurbala (May 12)
- Re: two interfaces one subnet Charles Wyble (May 11)
- Re: two interfaces one subnet Chris Meidinger (May 11)
- Re: two interfaces one subnet Nathan Ward (May 11)
- Re: two interfaces one subnet Duane Waddle (May 11)
- Re: two interfaces one subnet Alex H. Ryu (May 11)
- Re: two interfaces one subnet Chris Meidinger (May 11)
- Re: two interfaces one subnet Brielle Bruns (May 11)
- Re: two interfaces one subnet Kevin Oberman (May 11)
- Re: two interfaces one subnet Chris Meidinger (May 11)
- Re: two interfaces one subnet Patrick W. Gilmore (May 11)
- Re: two interfaces one subnet Arnold Nipper (May 11)
- Re: two interfaces one subnet Patrick W. Gilmore (May 11)
- Re: two interfaces one subnet Arnold Nipper (May 11)
- Re: two interfaces one subnet Patrick W. Gilmore (May 11)
- Re: two interfaces one subnet Chris Meidinger (May 11)
- Re: two interfaces one subnet Hector Herrera (May 11)
- Re: two interfaces one subnet Ben Scott (May 11)
- Re: two interfaces one subnet Patrick W. Gilmore (May 11)
- Re: two interfaces one subnet Ben Scott (May 11)
- Re: two interfaces one subnet James Hess (May 11)