Dell S6100, Руководство по настройке

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The
clear ip bgp
command is required for this command to take effect and to keep the BGP database
consistent. Execute the clear ip bgp command right after executing this command.
Related Commands
• clear ip bgp — clear the ip bgp.
bgp regex-eval-optz-disable
Disables the Regex Performance engine that optimizes complex regular expression with BGP.
Syntax bgp regex-eval-optz-disable
To re-enable optimization engine, use the no bgp regex-eval-optz-disable command.
Defaults Enabled
Command Modes ROUTER BGP (conf-router_bgp)
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide .
Version Description
9.10(0.0) Introduced on the S6100-ON.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000–ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
7.8.1.0 Introduced on the S-Series.
7.7.1.0 Introduced on the C-Series.
7.6.1.0 Introduced
Usage Information
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 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 much 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.
360 Border Gateway Protocol