Administrator Guide

Multipoint Receive-Only Type and IP Unnumbered
Interfaces for Tunnels
Multipoint receive-only type IP Tunnel is now supported in Z9000 platform. This is a new type of tunnel
that is expected to only decapsulate packets from remote end points but never forwards packets on the
tunnel. Additional level of protection on the receive-only type IP tunnels is available by allowing only a
given prefix/range of remote peers. IP unnumbered interface address configuration on the IP Tunnels is
now supported.
Tunnel interface’s operational status will always remain UP once tunnel is configured to work in
multipoint-receive-only mode. Allowed remote addresses configured for multipoint-receive-only type
tunnel are setup only for decapsulation and hence they are not marked for neighbor resolution like the
regular tunnel’s destination address. Connected route for the tunnel interface’s IP subnet will not be
pointing towards the tunnel and it will be pointing towards CPU for the receive-only tunnels. Tunnel
interface can function as IP unnumbered interface with no IP address assigned on it
822
Tunneling