HP 5920 Series User Manual

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ipv6-address: Specifies a peer by its IPv6 address. The peer must have been created.
Usage guidelines
To meet increasing user demands, BGP defines a new attribute—extended community attribute. The
extended community attribute has the following advantages over the COMMUNITY attribute:
• The extended community attribute has an 8-byte length.
• The extended community attribute supports various types. You can select an extended community
attribute type as needed to implement route filtering and control. This simplifies configuration and
management.
After you execute the peer advertise-ext-community command, route updates sent to the peer or peer
group carry the extended community attribute.
After you execute the undo peer advertise-ext-community command, BGP, upon receiving a route with
the extended community attribute, removes the extended community attribute before sending the route to
the peer or peer group.
Examples
# In BGP IPv4 unicast address family view, advertise the extended community attribute to peer group
test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] address-family ipv4 unicast
[Sysname-bgp-ipv4] peer test advertise-ext-community
# In BGP-VPN IPv4 unicast address family view, advertise the extended community attribute to peer
group test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] ip vpn-instance vpn1
[Sysname-bgp-vpn1] address-family ipv4 unicast
[Sysname-bgp-ipv4-vpn1] peer test advertise-ext-community
# In BGP IPv6 unicast address family view, advertise the extended community attribute to peer group
test.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] address-family ipv6 unicast
[Sysname-bgp-ipv6] peer test advertise-ext-community
Related commands
• apply extcommunity
• if-match extcommunity
• ip extcommunity-list
peer allow-as-loop
Use peer allow-as-loop to allow a local AS number to exist in the AS_PATH attribute of routes from a peer
or peer group, and to configure the number of times the local AS number can appear.
Use undo peer allow-as-loop to restore the default.

HP 5920 Series Specifications

General

Brand	HP
Model	5920 Series
Category	Switch
Language	English