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Restrictions for Configuring
Unnumbered Ethernet Interfaces
The following restrictions apply when you configure
unnumbered Ethernet interfaces:
- The unnumbered-address statement currently supports
the configuration of unnumbered Ethernet interfaces only for the IPv4
address family. Unnumbered Ethernet configuration for families other
than IPv4 is not supported.
- You cannot assign an IP address to an Ethernet interface
that is already configured as an unnumbered interface.
- The donor interface for an unnumbered Ethernet interface
must have one or more configured IP addresses.
- The donor interface for an unnumbered Ethernet interfaced
cannot be configured as unnumbered.
- An unnumbered Ethernet interface does not support configuration
of the following address statement options: arp, broadcast, primary, preferred, and vrrp-group. For information about these options, see Configuring the Interface Address.
- Running IGMP and PIM are supported only on unnumbered
Ethernet interfaces that directly face the host and have no downstream
PIM neighbors. IGMP and PIM are not supported on unnumbered Ethernet
interfaces that act as upstream interfaces in a PIM topology.
- Running OSPF and IS-IS on unnumbered Ethernet interfaces
is not supported.
- You cannot configure this feature on the TX Matrix platform.
- The configuration of unnumbered Ethernet interfaces is
not supported when graceful Routing Engine switchover (GRES) is enabled
on the router.
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