3Com 3031 Command Reference Manual page 799

3com 3031: reference guide

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Table of Contents

BGP/MPLS VPN Configuration Commands

both: Imports ingress and egress route information to the extended community of

vpn-target-ext-community: Adds vpn-target extended community attribute to the

ingress and egress of vpn-instance or the vpn-target extended community list of

ingress and egress.

Using the vpn-target command, you can create vpn-target extended community

for vpn-instance. Using the undo vpn-target command, you can remove the

vpn-target extended community attribute.

By default, the default value is both.

The vpn-target command you can create ingress and egress route target extended

community list for specified vpn-instance. Execute this command once for each

target community. Import the received route bearing the specific route target

extended community to all vpn-instances, which are configured extended

community as ingress route target. Vpn-target specifies a target VPN extended

community. Same as RD, an extended community is either composed with an

autonomous system number and an arbitrary number or composed with an IP

address and an arbitrary number.

Extended community has the following formats:

16-bit ASN: 32-bit number defined by user, for example, 100:1.

32-bit IP address: 16-bit number defined by user, for example, 172.1.1.1:1.

Create vpn-target extended community for the vpn-instance.

[3Com] ip vpn-instance vpn_red

[3Com-vpn-vpn_red] vpn-target 1000:1 both

[3Com-vpn-vpn_red] vpn-target 1000:2 export-extcommunity

[3Com-vpn-vpn_red] vpn-target 173.27.0.130:2 import-extcommunity

routing-table limit

routing-table limit { warn threshold | simply-alert }

undo routing-table limit

MBGP vpn-instance view

limit: Specifies the route maximum allowed in a vpn-instance.

warn threshold: Rejects routes when the threshold value is reached. This threshold

value is the percentage of the specified route maximum from 1 to 100.

simply-alert: When the route maximum specified for a vpn-instance exceeds the

threshold, routes can be added and only a SYSLOG error message is sent out.