peer ebgp-max-hop (BGP-VPN instance IPv6 address family view) (group)

Format

peer group-name ebgp-max-hop [ hop-count ]

undo peer group-name ebgp-max-hop

Parameters

Parameter	Description	Value
group-name	Specifies the name of a peer group.	The name is a string of 1 to 47 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.
hop-count	Specifies the maximum number of hops.	The value is an integer ranging from 1 to 255. By default, the maximum number of hops in an EBGP connection is 1. If the specified maximum number of hops is 1, EBGP connection cannot be established between non-directly connected devices. If hop-count is not specified in the peer ebgp-max-hop command, 255 is used as the maximum number of hops in EBGP connections.

Parameter

Description

Value

group-name

Specifies the name of a peer group.

The name is a string of 1 to 47 case-sensitive characters, with spaces not supported. When double quotation marks are used around the string, spaces are allowed in the string.

hop-count

Specifies the maximum number of hops.

The value is an integer ranging from 1 to 255. By default, the maximum number of hops in an EBGP connection is 1. If the specified maximum number of hops is 1, EBGP connection cannot be established between non-directly connected devices. If hop-count is not specified in the peer ebgp-max-hop command, 255 is used as the maximum number of hops in EBGP connections.

Views

BGP-VPN instance IPv6 address family view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

A directly-connected physical link must be available between EBGP peers. Otherwise, the peer ebgp-max-hop command must be used to allow EBGP peers to establish a TCP connection over multiple hops.

If loopback interfaces are used to establish an EBGP peer relationship, the peer ebgp-max-hop command needs to be run with the hop-count set to be greater than or equal to 2; otherwise, the peer relationship cannot be established.

Precautions

If the peer ebgp-max-hop command is used on one end of an EBGP connection, it must also be used on the other end.

NOTE:

The configurations of GTSM and EBGP-MAX-HOP affect the TTL values of sent BGP packets, and the configurations of the two functions are mutually exclusive.

Example

# Allow indirectly connected EBGP peer group to establish a connection with the local device.

<HUAWEI> system-view
[~HUAWEI] ip vpn-instance vpn1
[*HUAWEI-vpn-instance-vpn1] ipv6-family
[*HUAWEI-vpn-instance-vpn1-af-ipv6] route-distinguisher 100:1
[*HUAWEI-vpn-instance-vpn1-af-ipv6] quit
[*HUAWEI-vpn-instance-vpn1] quit
[*HUAWEI] bgp 100
[*HUAWEI-bgp] ipv6-family vpn-instance vpn1
[*HUAWEI-bgp-6-vpn1] group test external
[*HUAWEI-bgp-6-vpn1] peer test as-number 200
[*HUAWEI-bgp-6-vpn1] peer test ebgp-max-hop