Reference Guide

652 | IPv4 Routing
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Usage Information
Using the following example of a static route:
ip route 33.33.33.0 /24 gigabitethernet 0/0 172.31.5.43
• The software installs a next hop that is not on the directly connected subnet but which recursively
resolves to a next hop on the interface’s configured subnet. In the example, if gig 0/0 has ip
address on subnet 2.2.2.0 and if 172.31.5.43 recursively resolves to 2.2.2.0, FTOS installs the
static route.
• When the interface goes down, FTOS withdraws the route.
• When the interface comes up, FTOS re-installs the route.
• When recursive resolution is “broken,” FTOS withdraws the route.
• When recursive resolution is satisfied, FTOS re-installs the route.
Related
Commands
ip source-route
c e s z
Enable FTOS to forward IP packets with source route information in the header.
Syntax
ip source-route
To drop packets with source route information, enter no ip route-source.
Defaults
Enabled.
Command Modes
CONFIGURATION
Command History
ip unreachables
c e s z
Enable the generation of Internet Control Message Protocol (ICMP) unreachable messages.
Syntax
ip unreachables
To disable the generation of ICMP messages, enter no ip unreachables.
Defaults
Disabled
Command Modes
INTERFACE
show ip route View the switch routing table.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
pre-Version 6.1.1.0 Introduced for E-Series