Peer Allow-As-Loop - HP 5920 Series Command Reference Manual

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
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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
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if-match extcommunity
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ip extcommunity-list
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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.
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