Technical Documentation
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Monitoring GRE Tunnel Information
Purpose
Display information about GRE tunnels. The state keyword displays tunnels that are in a specific state: disabled, down, enabled, not-present, or up. The ip keyword to display tunnels associated with an IP address. To display information about a specific tunnel, include the name of the tunnel. To display information about tunnels on a specific virtual router, include the name of the virtual router.
Action
To display information about GRE Tunnel policy lists:
host1#show gre tunnel detail tunnelGre50
GRE tunnel tunnelGre50 is Down
Tunnel operational configuration
Tunnel mtu is '10240'
Tunnel source address is '0.0.0.0'
Tunnel destination address is '0.0.0.0'
Tunnel transport virtual router is source
Tunnel checksum option is disabled
Tunnel sequence number option is disabled
Tunnel up/down trap is enabled
Tunnel-server location is 6/0
Tunnel administrative state is Up
Statistics packets octets discards errors
Data rx 0 0 0 0
Data tx 0 0 0 0
GRE tunnel policy input routeGre25
classifier-group gre6 entry 1
0 packets, 0 bytes
traffic-class best-effort
mark 4 mask 255
GRE tunnel policy output routeGre35
classifier-group gre14 entry 1
0 packets, 0 bytes
traffic-class best-effort
mark 4 mask 255Meaning
Table 1 lists the show gre tunnel command output fields.
Table 1: show gre tunnel Output Fields
Field Name | Field Description |
|---|---|
GRE tunnel policy input | Policy for outbound traffic |
GRE tunnel policy output | Policy for inbound traffic |
traffic-class | Name of traffic class |
classifier-group | Name of classifier group |
entry | Identifier for the entry in the classifier group |
packets | Number of packets |
bytes | Number of bytes |
mark | ToS byte setting for the classifier control list |
mask | Mask value corresponding to the ToS |
