vrIpBgpExportAsPathExpression - Virtual Router Ip Bgp Export Autonomous System Path Expression

MIBs list

With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.

vrIpBgpExportAsPathExpression

Virtual Router Ip Bgp Export Autonomous System Path Expression

This key attribute allows the user to enter a regular expression to match the import AS Path Attribute of the export update message. Note: the AS Path Attribute lists the ASs in reverse traversal order. The syntax of the regular expression is a subset of the RFC 2280. The basic syntax of a regular expression is a list of AS number separated by a space which making up a AS path. The following characters has the special meaning: '.' - Matches any AS number. '^n' - Matches the first AS item (n) in the AS Path Attribute, or in order words, matches the last AS (n) traversed in the AS path. 'n$' - Matches the last AS item (n) in the AS Path Attribute, or in order words, matches the first AS (n) traversed in the AS path. '[n1 ... n2]' - Matches any AS number that appeared in the set n1 ... n2. 'n1 - n2' - Matches any AS number between the range of n1 and n2. '()' - is supported to change the order of evaluation. 'n*' - Matches 0 or more occurrences of n, where n can be a set, range or AS number. 'n+' - Matches 1 or more occurrences of n, where n can be a set, range or AS number. 'n?' - Matches 0 or 1 occurrences of n, where n can be a set, range or number. The following logical operators are evaluated in decending order: 'NOT' - Given a regular expression x, NOT x matches the AS number pattern that is not matched by x. 'AND' - Given two regular expressions x and y, x AND y matches the intersection of the AS path that are matched by x and those are matched by y. 'OR' - Given two regular expressions x and y, x OR y matches the union of the AS path that are matched by x and those are matched by y. For example: The AS path '5 4 3 2 1', where 1 is the origin AS, would be matched by any one of the following regular expressions: 1$, ^5, 4 3, 5 3 - 4*, 5 [4 3 2] not10 2 1, not (6 7 8 9 10) and 5 4 .* 1 Empty regular expression implies a match on all AS path.

Back to Nortel-Magellan-Passport-BgpMIB MIB page.

IPHost Network monitor allows you to monitor vrIpBgpExportAsPathExpression on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Nortel modems right now.

Easy monitoring of vrIpBgpExportAsPathExpression with IPHost tools

MIBs list