Displays system tunnel information for a specified tunnel or for all tunnels.
| tunnel_name | Specifies a tunnel name. |
| vr | Specifies showing tunnel information by VR. |
| vrname | Specifies showing tunnel information for a specific VR by name. The default is the context VR. |
| all | Specifies showing tunnels for all VRs. |
| payload-vr | Specifies showing tunnel information for payload VRs. |
| payload_vrname | Specifies showing tunnel information for a specific payload VR by name. If not specified, all tunnel payload VRs are shown. |
| detail | Shows detailed information for a tunnel. |
If not specified, the VR of current command context is used.
If not specified, all tunnel payload VRs are shown.
The tunnel keyword is optional only when you specify a valid IPv6-in-IPv4 or IPv6-to-IPv4 tunnel name. The Total tunnels count in the display represents all tunnels on the switch.
The following example displays system tunnel information for all tunnels:
# show tunnel
Name Type Flags
tunfour 6in4 10.20.30.40 => 10.10.10.10 U
mytun GRE 1.1.1.2 => 1.1.1.1
Utunfive2 6to4 10.20.30.40 => *.*.*.* D
Total tunnels: 3
Flags: (U) Up / (D) Down / (a) Administratively Disabled
(S) System Disabled (incompatible hardware)
The following example displays system tunnel information for tunnel "tunfour":
# show "tunfour" Name Type Flags tunfour 6in4 10.20.30.40 => 10.10.10.10 U Total tunnels: 2 Flags: (U) Up / (D) Down
The following example shows detailed information about tunnel "mytunl":
# show tunnel mytun1 detail
Tunnel Name : mytun
Tunnel Type : GRE
Flags : Administratively Disabled
Source Address : 1.1.1.1
Destination Address : 1.1.1.2
IPv4 Forwarding : Enabled
Virtual Router (VR) : vr-transport
Payload VR : vr-tenant
Interface Address : 2.0.0.1/24
The following example shows detailed information about tunnel "mytunnel" with TCP MSS adjustment configuration:
# show mytunnel detail
Tunnel Name : mytunnel
Tunnel Type : GRE
Flags : Up
Source Address : 1.1.1.1
Destination Address : 1.1.1.2
IPv4 Forwarding : Enabled
Virtual Router (VR) : VR-Default
Payload VR : VR-Default
Interface Address : 20.20.20.1/24
fe80::101:101/64
2001:100:100:100::1/64
TCP Adjust MSS : IPv4: On IPv6: On
TCP MSS Value : IPv4: 9130 IPv6: 9110
The following example shows detailed information about tunnel "mytunnel" with an IP MTU value of 1476:
# show mytunnel detail
Tunnel Name : mytunnel
Tunnel Type : GRE
Flags : Up
Source Address : 1.1.1.1
Destination Address : 1.1.1.2
IPv4 Forwarding : Enabled
Virtual Router (VR) : VR-Default
Payload VR : VR-Default
IP MTU : 1476
Interface Address : 20.20.20.1/24
fe80::101:101/64
2001:100:100:100::1/64
TCP Adjust MSS : IPv4: On IPv6: On
TCP MSS Value : IPv4: 9130 IPv6: 9110
The following example shows detailed information about tunnel "mytunnel" with IPv6 transport in IPv4 GRE tunnel enabled:
# show mytunnel detail
Tunnel Name : mytunnel
Tunnel Type : GRE
Flags : Up
Source Address : 1.1.1.1
Destination Address : 1.1.1.2
IPv4 Forwarding : Enabled
IPv6 Forwarding : Enabled
Virtual Router (VR) : VR-Default
Payload VR : VR-Default
Interface Address : 2.0.0.1/24
fe80::303:301/64
200e::1/64
200a::1/64
IP MTU : 1400
TCP Adjust MSS : IPv4: On IPv6: On
TCP MSS Value : IPv4: 1410 IPv6: 1200
This command was first available in ExtremeXOS 11.2.
Options to specify VR/payload VR and detailed tunnel information were added in ExtremeXOS 31.2.
TCP MSS adjustment information was added in ExtremeXOS 31.6.
IPv6 transport in IPv4 GRE tunnel was added in ExtremeXOS 32.3.
This command is available on the platforms listed for the IPv6 interworking feature in the Switch Engine v33.1.1 Licensing Guide document.