And/or see if bell canada can sell you something diverse. ----- Original Message ----- From: Seth Mattinen <sethm@rollernet.us> To: Charles Regan <charles.regan@gmail.com> Cc: nanog@nanog.org <nanog@nanog.org> Sent: Fri Feb 13 18:58:54 2009 Subject: Re: One /22 Two ISP no BGP Charles Regan wrote:
The problem we have now is that we got our /22 from arin to do multihoming. If we dump tlb, no more multihoming? No /22. Is that correct?
We also have a contract with tlb. $$$ 1.5yrs left...
There's something in there about non-multihomed sites, but I'm not familiar with it. Telebec doesn't appear to be multihomed, though. The only other thing I can think of to avoid horrible hackery is to convince them to colo a router for you to do eBGP to. Honestly, I wouldn't recommend multihoming *without* BGP. One day you'll end up with some really ugly failure mode. ~Seth
If all else fails, you could setup a pair of static IPIP or GRE tunnels using the static provider-assigned address on your link into the non-bgp speaking provider. Then, terminate the 'far side' of the tunnel on a router collocated somewhere upstream of if the brain-dead provider. This would get you a 'unicast overlay' across the brain-dead reseller of the bell.ca transit to a router where you could speak bgp to real-er transits providers, peers, or others networks. If you had the luxury of a cisco 720x/7301 pair (for your local router and upstream tunnel endpoint), you could take advantage of the transparent ip fragmentation and virtual-reassembly in 12.4, ip tcp mss 'adjustment' (to handle the 20+ bytes of lost MTU via the tunnel), and some shaping/fancy-QoS for making the (likely) congested-as-heck path in or out of this network a bit less horrible for end-users. Best, -Tk
The short story behind this deployment is that Charle's infrastructure is at the tail end of a submarine cable on an island, where there is only 1 competitor, but the ILEC, on the island side of the submarine cable. The ILEC owns the submarine cable But the ILEC will not do BGP The competitor will do BGP But the the ILEC will not do BGP Because the ILEC has yet to do BGP with anyone in its serving territory. Its a SMALL ILEC which does not have ISP customers wishing to do BGP elsewhere in its territory. I have told Charles that should he wish to complain to the regulator, to force the ILEC to do BGP, then we would help him. His question is rather - how to do multihoming on the same /22, when one the two upstream ISPs, will not do BGP. And the obvious answer is, S.O.L. The not so obvious answer, is ANYONE OUT THERE knows how to do multihoming without BGP on one of the two legs... F. -- François D. Ménard francois@menards.ca On 13-Feb-09, at 7:01 PM, Michael Smith wrote:
And/or see if bell canada can sell you something diverse.
----- Original Message ----- From: Seth Mattinen <sethm@rollernet.us> To: Charles Regan <charles.regan@gmail.com> Cc: nanog@nanog.org <nanog@nanog.org> Sent: Fri Feb 13 18:58:54 2009 Subject: Re: One /22 Two ISP no BGP
Charles Regan wrote:
The problem we have now is that we got our /22 from arin to do multihoming. If we dump tlb, no more multihoming? No /22. Is that correct?
We also have a contract with tlb. $$$ 1.5yrs left...
There's something in there about non-multihomed sites, but I'm not familiar with it. Telebec doesn't appear to be multihomed, though.
The only other thing I can think of to avoid horrible hackery is to convince them to colo a router for you to do eBGP to. Honestly, I wouldn't recommend multihoming *without* BGP. One day you'll end up with some really ugly failure mode.
~Seth
participants (3)
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Anton Kapela
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Francois Menard
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Michael Smith