Enabling BGP to establish an EBGP session over multiple hops

IMPORTANT:

When GTSM is configured, the local device can establish an EBGP session with the peer after both devices pass GTSM check, regardless of whether the maximum number of hops is reached.

To establish an EBGP connection, two routers must have a direct physical link. If no direct link is available, you must use the peer ebgp-max-hop command to enable BGP to establish an EBGP session over multiple hops and specify the maximum hops.

If directly connected EBGP peers use loopback interfaces to establish a BGP session, you do not need to configure the peer ebgp-max-hop command.

To enable BGP to establish an indirect EBGP session (IPv4):

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter BGP view or BGP-VPN instance view.	Enter BGP view:bgp as-number Enter BGP-VPN instance view: bgp as-number ip vpn-instance vpn-instance-name	N/A
3. Enable BGP to establish an EBGP session to an indirectly-connected peer or peer group and specify the maximum hop count.	peer { group-name \| ip-address [ mask-length ] } ebgp-max-hop [ hop-count ]	By default, BGP cannot establish an EBGP session to an indirectly-connected peer or peer group.

To enable BGP to establish an indirect EBGP session (IPv6):

Step	Command	Remarks
1. Enter system view.	system-view	N/A
2. Enter BGP view or BGP-VPN instance view.	Enter BGP view:bgp as-number Enter BGP-VPN instance view: bgp as-number ip vpn-instance vpn-instance-name	N/A
3. Enable BGP to establish an EBGP session to an indirectly-connected peer or peer group and specify the maximum hop count.	peer { group-name \| ipv6-address [ prefix-length ] } ebgp-max-hop [ hop-count ]	By default, BGP cannot establish an EBGP session to an indirectly-connected peer or peer group.

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