Technical data

Using Technician Interface Software
8-76
303561-A Rev 00
Routing Tables
Each slot on the router maintains an independent routing table (or “routing pool”).
The table is the default (but not initial) source for a slot to look up routing
information necessary to forward locally received packets.
Each routing table continuously receives, from IP and all other nonmulticast IP
protocols configured on the router, updates on routes added, changed, or deleted in
your network. By means of this continuous, high-speed, internal update
mechanism, the system synchronizes the contents of routing tables on all slots.
(The only exceptions to this rule occur during the first 10 seconds of a router boot
or slot reset operation.)
ip bgp_routes -R 555 Match any occurrence of the string 555 in any AS
path.
AS path contains:
ip bgp_routes -R _234 333 343_ Match any consecutive occurrence of these
Autonomous Systems.
ip bgp_routes -R >{ Match any AS path that contains both a SEQUENCE
and a SET.
AS path begins with:
ip bgp_routes -R ^666_ Match any AS path that begins with AS 666.
ip bgp_routes -R ^666 Match any AS path that begins with an AS that
begins with 666 (for example, 666 or 6661).
AS path ends with:
ip bgp_routes -R _555}$ Match any AS path that ends in a SET and the last
AS in the set is 555.
ip bgp_routes -R _555$ Match any AS path ending in AS 555.
ip bgp_routes -R _555_}$ Match any AS path in which the last segment is a
SET and 555 is the last AS in the SET.
AS patch contains this pattern OR that:
ip bgp_routes -R
_555_|^666_|_777$|_44_
Match the AS path containing AS 555 or AS 44, or
match AS paths beginning with 666 or ending with
777.
Table 8-9. Simplified AS Pattern Matching Examples
(continued)
Command Operation