F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100

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Local

arameter

Peer

arameter

otiation result

receive

• send

• both

The local end can only receive ORF information, and the

peer end can only send ORF information.

both both

Both the local and peer ends can send and receive ORF

information.

1507BEnabling 4-byte AS number suppression

When a device that supports 4-byte AS numbers sends an Open message for session establishment, the

Optional parameters field of the message indicates that the AS number occupies four bytes—in the

range of 1 to 4294967295. If the peer device does not support 4-byte AS numbers (for examples, it

supports only 2-byte AS numbers), the session cannot be established.

After you enable the 4-byte AS number suppression function, the peer device can then process the Open

message even though it does not support 4-byte AS numbers, and the BGP session can be established.

If the peer device supports 4-byte AS numbers, do not enable the 4-byte AS number suppression function;

otherwise, the BGP peer relationship cannot be established.

To enable 4-byte AS number suppression:

Ste

Command

Remarks

584. Enter system view.

system-view N/A

585. Enter BGP view or BGP-VPN

instance view.

• Enter BGP view:

bgp as-number

• Enter BGP-VPN instance view:

a. bgp as-number

b. ipv4-family vpn-instance

vpn-instance-name

Use either approach.

586. Enable 4-byte AS number

suppression.

peer { group-name | ip-address }

capability-advertise suppress-4-byte-as

Disabled by default.

1508BEnabling quick reestablishment of direct EBGP session

When the link to a directly connected EBGP peer is down, the router, with quick EBGP session

reestablishment enabled, tears down the session to the peer, and then reestablishes a session

immediately. If the function is not enabled, the router does not tear down the session until the holdtime

times out. A route flap does not affect the EBGP session state when the quick EBGP session

reestablishment is disabled.

To enable quick reestablishment of direct EBGP session:

Ste