Reference Guide
704 | IPv4 Routing
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ip unreachables
c e s
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 
Command
History
ip vlan-flooding
e
Enable unicast data traffic flooding on VLAN member ports.
Syntax
ip vlan-flooding 
To disable, use the no ip vlan-flooding command.
Defaults
disabled
Command Modes
CONFIGURATION
Command
History
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
Version 8.3.19.0 Introduced on S4820T 
Version 8.3.7.0 Introduced on S4810 
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.6.1.0 Introduced on S-Series
Version 7.5.1.0 Introduced on C-Series
pre-Version 6.1.1.0 Introduced on E-Series
Version 8.1.1.0 Introduced on E-Series ExaScale
Version 7.4.1.0 Introduced on E-Series










