Administrator Guide

Defaults 0 (Mapped original packet flow-label value to tunnel header flow-label value)
Command Modes INTERFACE TUNNEL (conf-if-tu)
Command
History
Version Description
9.9(0.0) Introduced on the C9010.
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S6000, S4810, S4820T, Z9000.
Usage
Information
This command is only valid for tunnel interfaces with an IPv6 outer header.
tunnel hop-limit
Configure the method to set the IPv4 time-to-live or the IPv6 hop limit value in the outer tunnel header.
C9000 Series
Syntax
tunnel hop-limit value
To restore the default tunnel hop-limit, use the no tunnel hop-limit command.
Parameters
value Enter the hop limit (ipv6) or time-to-live (ipv4) value to include in the tunnel
header. The range is from 0 to 255. The default is 64.
Defaults 64 (Time-to-live for IPv4 outer tunnel header or hop limit for IPv6 outer tunnel header)
Command Modes INTERFACE TUNNEL (conf-if-tu)
Command
History
Version Description
9.9(0.0) Introduced on the C9010.
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S6000, S4810, S4820T, Z9000.
Usage
Information
A value of 0 copies the inner packet hop limit (ipv6) or time-to-live (ipv4) in the encapsulated packet to
the tunnel header hop limit (ipv6) or time-to-live (ipv4) value.
tunnel keepalive
Configure the tunnel keepalive target, interval and attempts.
C9000 Series
Syntax
tunnel keepalive {ip-address | ipv6-address}[interval {seconds}] [attempts
{count | unlimited}]
To disable the tunnel keepalive probes use the no tunnel keepalive command.
Parameters
ip-address ipv6
address
Enter the IPv4 or IPv6 address of the peer to which the keepalive probes
will be sent.
interval seconds
Enter the keyword interval then the interval time, in seconds, after which the
restart process to keepalive probe packets.
1724 Tunneling Commands