Avaya Configuring IP Exterior Gateway Protocols (BGP and EGP) Manuale Utente Scaricare il pdf (Pagina 140)

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101

Configuring IP Exterior Gateway Protocols (BGP and EGP)

7-24

308628-14.00 Rev 00

Configuring BGP-4 AS Pattern-Matching

Table 7-7 describes the special characters used in the Nortel Networks

implementation of AS pattern-matching.

Table 7-7. Characters in AS Path Pattern-Matching

Symbol or

Operator Meaning

< Denotes the beginning of an AS SEQUENCE segment

> Denotes the end of an AS SEQUENCE segment

{ Denotes the beginning of an AS SET segment

} Denotes the end of an AS SET segment

seq

set

} Denotes an AS path containing a sequence in the first segment and

a set in the second segment

^ Denotes the following pattern occurs at the beginning of the AS path

$ Denotes the preceding pattern occurs at the end of the AS path

| Denotes logical OR - match this or that

_ Matches exactly the AS specified by

Matches the AS pattern beginning with

(for example, “_99”

matches 99, 991, 9934)

_ Matches the AS pattern ending with

(for example, “99_” matches

99,199, 23299)

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