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-type interface-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.
