When a Route Processor resides in a
VTP domain other than the domain in which the switch resides, the
switch can not multilayer switch frames for that router. There are
several ways in which a Route Processor and switch can end up in
different VTP domains:
- You can purposely place both
devices in separate domains.
- You can misname or mistype the VTP
domain when configuring either the switch or the Route
Processor.
- You can enter the MLS interface
command prior to putting the interface in a VTP domain.
Enabling MLS on an interface before
assigning the interface to a VTP domain places the interface in the
null domain. When an interface resides in a null domain, it cannot
participate in MLS with the switch. To remove the MLS interface from
a null VTP domain, disable MLS on the interface.
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