nanog mailing list archives
Re: IPv6 routing protocols
From: Nick Hilliard <nick () foobar org>
Date: Fri, 10 Jun 2011 13:26:09 +0100
On 10/06/2011 11:37, Iljitsch van Beijnum wrote:
So it depends a little, but I still don't see any implementation leeway in RFC 2545:
On all competently constructed interior networks, ibgp will use loopbacks as the session endpoints. This means that the loopback address will be carried as the next-hop in the UPDATE messages rather than the link local address. Ok, you can do physical interface to physical interface on ibgp if you want, and if you do, good luck with that idea.
For those bgp sessions which use directly connected subnets (e.g. most ebgp and badly configured interior networks), this is implementation dependent. Some stacks by default provide both the link-local and the global address; others provide just the global address; others still will provide link-local depending on interface configuration (e.g. the per-interface "ipv6 enable" command on IOS).
Once the router has learned the next-hop, it may or may not choose to display it differently when you're displaying ipv6 forwarding information. Some router stacks implement implicit next-hop resolution for their own RIB to forwarding table; others don't. Some will display this information and others don't.
So really, it depends. Nick
Current thread:
- Re: The stupidity of trying to "fix" DHCPv6, (continued)
- Re: The stupidity of trying to "fix" DHCPv6 Owen DeLong (Jun 16)
- Re: The stupidity of trying to "fix" DHCPv6 Matt Addison (Jun 14)
- Re: The stupidity of trying to "fix" DHCPv6 William Herrin (Jun 10)
- Re: Cogent IPv6 Nick Hilliard (Jun 09)
- Re: Cogent IPv6 Ray Soucy (Jun 09)
- Re: Cogent IPv6 Nick Hilliard (Jun 09)
- IPv6 routing protocols Iljitsch van Beijnum (Jun 10)
- Re: IPv6 routing protocols Nick Hilliard (Jun 10)
- Re: IPv6 routing protocols Iljitsch van Beijnum (Jun 10)
- Re: IPv6 routing protocols Iljitsch van Beijnum (Jun 10)
- Re: IPv6 routing protocols Nick Hilliard (Jun 10)
- Re: IPv6 routing protocols Iljitsch van Beijnum (Jun 10)
- Re: IPv6 routing protocols Owen DeLong (Jun 10)
- Re: IPv6 routing protocols Xiaoliang Zhao (Jun 10)
- Re: Cogent IPv6 Iljitsch van Beijnum (Jun 09)
- Re: Cogent IPv6 Owen DeLong (Jun 09)
- Re: Cogent IPv6 Ray Soucy (Jun 09)
- Re: Cogent IPv6 Tom Hill (Jun 09)