Bgp Router-Id - Dell Force10 Z9000 Reference Manual

Defaults Enabled
Command Modes ROUTER BGP (conf-router_bgp)
Command History
Version 8.3.11.1
Version 8.3.7.0
Version 7.8.1.0
Version 7.7.1.0
Version 7.6.1.0
Usage
BGP uses regular expressions (regex) to filter route information. In particular, the use of
Information
regular expressions to filter routes based on AS-PATHs and communities is quite common. In a
large scale configuration, filtering millions of routes based on regular expressions can be quite
CPU intensive, as a regular expression evaluation involves generation and evaluation of
complex finite state machines.
BGP policies, containing regular expressions to match as-path and communities, tend to use a
lot of CPU processing time, which in turn affects the BGP routing convergence. Additionally,
the show bgp commands, which are filtered through regular expressions, use up CPU cycles
particularly with large databases. The Regex Engine Performance Enhancement feature
optimizes the CPU usage by caching and reusing regular expression evaluation results. This
caching and reuse may be at the expensive of RP1 processor memory.
Examples
FTOS(conf-router_bgp)#no bgp regex-eval-optz-disable
FTOS(conf-router_bgp)#do show ip protocols
Routing Protocol is "ospf 22222"
Routing Protocol is "bgp 1"
Regular expression evaluation optimization enabled
FTOS(conf-router_bgp)#
Related show ip protocols
Commands Series.

bgp router-id

Assign a user-given ID to a BGP router.
C-Series, E-Series, S-Series, Z-Series, S4810
Syntax bgp router-id ip-address
To delete a user-assigned IP address, use the no bgp router-id command.
Introduced on the Z9000.
Introduced on the S4810.
Introduced on the S-Series.
Introduced on the C-Series.
Introduced
Router ID is 2.2.2.2
Area
51
Cluster Id is set to 10.10.10.0
Router Id is set to 10.10.10.0
Fast-external-fallover enabled
Capable of ROUTE_REFRESH
For Address Family IPv4 Unicast
BGP table version is 0, main routing table version 0
Distance: external 20 internal 200 local 200
– views information on all routing protocols enabled and active on the E-
Routing for Networks
10.10.10.0/00
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