RFC 2546 (rfc2546) - Page 2 of 10
6Bone Routing Practice
Alternative Format: Original Text Document
RFC 2546 6Bone Routing Practice March 1999
pTLA sites MUST use BGP4+ [RFC 2283] as the mandatory routing
protocol for exchanging routing information among them.
Multi-homed sites or pNLAs SHOULD also use BGP4+. Regular sites MAY
use a simple default route to their ISP.
3. Common Rules
This section details common rules governing the routing on the 6Bone.
They are derived from issues encountered on the 6Bone, with respect
to the routes advertised, handling of special addresses, and
aggregation:
1) link local prefixes
2) site local prefixes
3) loopback prefix & unspecified prefix
4) multicast prefixes
5) IPv4-compatible prefixes
6) IPv4-mapped prefixes
7) default routes
8) Yet undefined unicast prefixes (from a different /3 prefix)
9) Inter site links issues
10) aggregation & advertisement issues
3.1 Link-local prefix
The link-local prefix (FE80::/10) MUST NOT be advertised through
either an IGP or an EGP.
By definition, the link-local prefix has a scope limited to a
specific link. Since the prefix is the same on all IPv6 links,
advertising it in any routing protocol does not make sense and,
worse, may introduce nasty error conditions.
Well known cases where link local prefixes could be advertised by
mistake include:
Durand & Buclin Informational