No inbound ip access-list is set
No outgoing ip access-list is set
Syntax:
show ip interface tunnel
[
tunnel-ID
]
The
tunnel-ID
variable is a valid tunnel number between 1 and 72.
The
show interface tunnel
command displays the GRE tunnel configuration and the pmtd aging timer information.
device# show interface tunnel 10
Tunnel10 is up, line protocol is up
Hardware is Tunnel
Tunnel source 1.1.41.10
Tunnel destination is 1.1.14.10
Tunnel mode gre ip
Port name is GRE_10_to_VR1_on_FCX_STACK
Internet address is 223.223.1.1/31, MTU 1476 bytes, encapsulation GRE
Keepalive is not Enabled
Path MTU Discovery: Enabled, MTU is 1428 bytes, age-timer: 10 minutes
Path MTU will expire in 0 minutes 50 secs
Syntax:
show interface tunnel
[
tunnel-ID
]
TABLE 17
show interface tunnel output descriptions
Field
Definition
Hardware is Tunnel
The interface is a tunnel interface.
Tunnel source
The source address for the tunnel.
Tunnel destination
The destination address for the tunnel.
Tunnel mode
The tunnel mode. The gre specifies that the tunnel will use GRE
encapsulation (IP protocol 47).
Port name
The port name (if applicable).
Internet address
The internet address.
MTU
The configured path maximum transmission unit.
encapsulation GRE
GRE encapsulation is enabled on the port.
Keepalive
Indicates whether or not GRE link keepalive is enabled.
Path MTU Discovery
Indicates whether or not PMTUD is enabled. If PMTUD is enabled, the
MTU value is also displayed.
Path MTU
The PMTU that is dynamically learned.
Age-timer
Indicates the pmtd aging timer configuration in minutes.The default is 10.
The range is from 10 - 30.
Path MTU will expire
Indicates the time after which the learned PMTU expires. This line is
displayed only when a PMTU is dynamically learned.
The
show ip tunnel traffic
command displays the link status of the tunnel and the number of keepalive packets received and sent on the
tunnel.
device# show ip tunnel traffic
IP GRE Tunnels
Tunnel Status Packet Received Packet Sent KA recv KA sent
1 up/up 362 0 362 362
3 up/up 0 0 0 0
10 down/down 0 0 0 0
Syntax:
show ip tunnel traffic
IPv4 point-to-point GRE tunnels
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