Regular Expression Usage in Match Community

Modified on: Fri, 23 Jun, 2023 at 7:58 AM

Applicable plans a b c d

Question

How to find the routes adhering to a particular pattern?

Solution

Routes are attached with multiple community values.

This article provides examples to find the routes adhering to a particular pattern.

100:1, 200:11, 400:11, 400:12, 400:10, 500:11, 500:12

Match all routes with any one of these communities:

400:11, 400:12, 500:11, 500:12

Following is the configuration:

% set routing-instances mgmt protocols bgp 1 routing-peer-policy p1 term t1 match community "(^|,)(([0-9]*:11)|([0-9]*:12))($|,)"

% set routing-instances mgmt protocols bgp 1 routing-peer-policy p1 term t1 match community "(^|,)(((400|500):11)|((400|500):12))($|,)"

Match all routes with any one of these communities:

400:11, 400:12, 400:10

Following is the configuration:

% set routing-instances mgmt protocols bgp 1 routing-peer-policy p1 term t1 match community "(^|,)(400:(10|11|12))($|,)"

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