Bgp Regex-Eval-Optz-Disable; Bgp Router-Id - Dell Force10 Z9000 Reference Manual

Ftos command line reference guide for the z9000 system ftos 9.1.(0.0)

Hide thumbs Also See for Force10 Z9000:

Table of Contents

clear ip bgp

bgp regex-eval-optz-disable

Disables the Regex Performance engine that optimizes complex regular expression with BGP.

C-Series, E-Series

bgp regex-eval-optz-disable

To re-enable optimization engine, use the no bgp regex-eval-optz-disable

Command Modes

ROUTER BGP (conf-router_bgp)

Command History

Version 8.2.1.0

Version 7.6.1.0

BGP uses regular expressions (regex) to filter route information. In particular, the use of

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.

show ip protocols

Assign a user-given ID to a BGP router.

C-Series, E-Series

bgp router-id ip-address

To delete a user-assigned IP address, use the no bgp router-id command.

The router ID is the highest IP address of the Loopback interface or, if you do not configure

Loopback interfaces, the highest IP address of a physical interface on the router.

Introduced on the E-Series ExaScale.

– views information on all routing protocols enabled and active on the E-

Enter an IP address in dotted decimal format to reset only that BGP