3Com Router 3031, Command Reference Manual

Page: 799 / 838

BGP/MPLS VPN Configuration Commands 799
both: Imports ingress and egress route information to the extended community of
target VPN.
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.
Description
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.
Example
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 Syntax
routing-table limit { warn threshold | simply-alert }
undo routing-table limit
View
MBGP vpn-instance view
Parameter
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.