Network Interface - Alcatel-Lucent 7705 Configuration Manual

Network Interface

A network interface (a logical IP routing interface) can be configured on a network-facing
physical or logical port, and is used for connectivity purposes. Each network interface can
have only one IP address. The connections are point-to-point; for example, a network port on
an Ethernet interface cannot be connected to a LAN but must be connected to a network
interface on another router.
Secondary IP address assignment, which is used to connect the same interface to more than
one subnet, is not supported.
Network ports are used to transport Ethernet, ATM, and TDM services by means of
pseudowires.
IP address assignment is not supported on access (customer-facing) ports except for services
such as IES or VPRN.
On the 2-port 10GigE (Ethernet) Adapter card/module, the network interface can only be
created on the v-port (not the ring ports).
The 7705 SAR can be used as an LER (label edge router) or LSR (label switch router).
OSPF, RIP, IS-IS, and BGP are supported as dynamic routing protocols, and static routes to
next-hop addresses are also supported.
Some network Ethernet ports support network egress per-VLAN shapers on a per-network-
interface basis. Refer to the "Per-VLAN Network Egress Shapers" section in the
7705 SAR OS Quality of Service Guide for details.
Ethernet Ports and Multiple ARP Entries
Multiple far-end MAC addresses can be associated with an Ethernet network port on the
Ethernet Adapter card. These IP-to-MAC mappings are stored in the ARP table.
With multiple far-end MAC addresses supported in the ARP table, an Ethernet port can work
with multiple network devices located in the same LAN segment. The 7705 SAR provides
dynamic addressing by the ARP protocol as soon as MAC address resolution is needed for a
given IP address. As devices are added to or removed from the network, the router updates
the ARP table, adding new dynamic addresses and aging out those that are not in use.
Using the ARP table, the 7705 SAR inserts the appropriate far-end MAC address into the
egress packet after the forwarding decision has been made based on the routing tables.
7705 SAR OS Router Configuration Guide
IP Router Configuration
21