nanog mailing list archives
Re: Multi-6 [WAS: OT - Vint Cerf joins Google]
From: Tony Li <tony.li () tony li>
Date: Mon, 12 Sep 2005 16:29:16 -0700
Whilst this thread is open... perhaps someone can explain to me how shim6 is as good as multihoming in the case of redundancy when one of the links is down at the time of the initial request, so before any shim-layer negotiation happens. I must be missing something, but there's a good chance that the requester is going to have to wait for a timeout on their SYN packets before failing over to another address to try. Or is the requester supposed to send SYNs to all addresses for a hostname and race them off?
There are a variety of possible implementations. A full timeout and serial retries are one extreme. Trying all addresses in parallel is another. Anything in between is not out of the bounds of possibility. IMHO, the thing to do is to send out the first SYN and wait 1 RTT, not a full timeout. Then, try two addresses. After the next RTT, try four addresses... It's just binary exponential backoff of another flavor. ;-) My $.02, Tony
Current thread:
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google], (continued)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] John Payne (Sep 12)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Iljitsch van Beijnum (Sep 13)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Daniel Senie (Sep 13)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Iljitsch van Beijnum (Sep 13)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] John Payne (Sep 13)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Christopher L. Morrow (Sep 13)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Marshall Eubanks (Sep 12)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Christian Kuhtz (Sep 13)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Christopher L. Morrow (Sep 13)
- SHIM6 (Was: Multi-6) Michael . Dillon (Sep 14)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Tony Li (Sep 12)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Richard A Steenbergen (Sep 11)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] David Conrad (Sep 11)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Patrick W. Gilmore (Sep 11)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Richard A Steenbergen (Sep 11)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Bruce Campbell (Sep 11)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] David Barak (Sep 13)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Tony Li (Sep 13)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Christopher L. Morrow (Sep 10)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] Joe Abley (Sep 11)
- Re: Multi-6 [WAS: OT - Vint Cerf joins Google] JORDI PALET MARTINEZ (Sep 11)