Cisco ASR 9000 Series Routing Configuration Guide

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remote static neighbor: Any neighbor that uses unicast to communicate, is multiple hops away, and
whose IP address has been specified using the neighbor ip-address command.
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remote unicast-listen (or simply unicast-listen): Any neighbor that uses unicast to communicate, is
multiple hops away, and whose IP address has not been configured using the neighbor ip-address
command.
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remote dnyamic: Any neighbor that is multiple hops away and whose address has not been configured
with the neighbor ip-address command, that is, a remote multicast-group or remote unicast-listen neighbor,
but not a remote static neighbor.
Remote Unicast-Listen (Point-to-Point) Neighbors
For configurations in which multiple remote neighbors peer with a single hub (point-to-point), the hub can
be configured for remote unicast-listen peering using the remote-neighbors command to allow the remote
neighbors to peer with the hub without having to manually configure the remote neighbor IP addresses on the
hub. When configured with this command, the hub device:
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Uses its interface IP address as the source IP address for any unicast transmissions. This IP address must
be routable.
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Requires neighbors that peer with the hub to be configured using the neighbor ip-address loopback
loopback-interface-number remote maximum-hops command where ip-address is the unicast address
of the local device interface.
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Listens for unicast HELLO packets on the interface specified in the remote-neighbor command.
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Accepts a unicast HELLO packet if it is in the IP address range configured using the allow-list keyword,
or any unicast HELLO packet if an allow list is not defined.
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Rejects multicast HELLO packets from any neighbor that is also sending unicast HELLO packets and
is permitted by the unicast allow list (or all neighbors if an allow list is not defined).
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Begins normal neighbor establishment using the IP addresses of the remote neighbors for packet
transmission once the neighbor relationship is established.
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When remote-neighbor command is configured on an interface, the router will only start sending HELLOs
on that interface if it has atleast one neighbor and only to those neighbors from which it has received
HELLOs.
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On an interface if dynamic neighbors already exist and remote-neighbor unicast- listen is configured,
then the existing neighbor relationships will be torn down and only unicast-neighbor relationships will
be allowed there after.
Restrictions for remote neighbors
A single unicast address can only be configured to a single remote static neighbor for a given address-family.
You cannot configure a second remote static neighbor using the same unicast address, on a different interface.
EIGRP configuration of remote neighbors under different address families is unrestricted.
A single interface can be configured under a single address family with a single unicast-listen remote-neighbors
command and with any number of static and remote static neighbors (each using a different unicast address).
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
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Implementing EIGRP
Configuring unicast neighbors

Cisco ASR 9000 Series Specifications

General

Brand	Cisco
Model	ASR 9000 Series
Category	Network Router
Language	English