3Com MSR 50, MSR 30 manual Source, 1755

1755

Use the undo keepalive command to disable the keepalive function.

By default, the GRE keepalive function is disabled.

With the GRE keepalive function enabled on a tunnel interface, the device sends GRE keepalive packets from the tunnel interface periodically. If no response is received from the peer within the specified interval, the device retransmits a keepalive packet. If the device still receives no response from the peer after a keepalive packet is transmitted for the maximum number of attempts, the local tunnel interface goes down and keeps down until it receives a keepalive acknowledgement packet from the peer.

Related command: interface tunnel.

Example # Set the GRE keepalive interval to 20 seconds and the maximum number of attempts for transmitting a keepalive packet to 5.

<Sysname> system-view

[Sysname] interface tunnel 0

[Sysname-Tunnel0] keepalive 20 5

source

Syntax source { ip-address ipv6-address interface-type interface-number }

undo source

View Tunnel interface view

Parameter ip-address: Source IPv4 address for a tunnel interface.

Ipv6-address: Source IPv6 address for a tunnel interface.

interface-typeinterface-number: Type and number of the source interface for a tunnel interface. The interface type can be Ethernet, VLAN, serial, ATM, tunnel, or loopback.

Description Use the source command to specify the source address or interface for a tunnel interface.

Use the undo source command to remove the configuration.

By default, no source address or interface is configured for a tunnel interface.

Note that:

■The source address of a tunnel interface is the address of the interface sending GRE packets and is usually the destination address of the peer tunnel interface.

■Two or more tunnel interfaces using the same encapsulation protocol must have different source addresses and destination addresses.