Owner's Manual

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Figure 13-105. Routing Instances -> VRF Instances - Routing Options
It has the following fields:
-
Router ID —BGP and OSPF (Open Shortest Path First) uses the router identifier to identify the
router from which a packet originated. The router identifier usually is the IP address of the
local router. If you do not configure a router identifier, the VRF uses the IP address of the first
interface to come online. This is usually the loopback interface. Otherwise, it uses the first
hardware interface with an IP address.
-
AS Number —An autonomous system (AS) is a set of routers that are under a single technical
administration and that generally use a single interior gateway protocol (IGP) and metrics to
propagate routing information within the set of routers. An AS appears to other Autonomous
Systems to have a single, coherent interior routing plan and presents a consistent picture of
what destinations are reachable through it.
A number assigned by the Network Information Center (NIC) in the United States (from 1
through 65,535) identifies Autonomous Systems.
If you are using the Border Gateway Protocol (BGP) on the router, you must configure an AS
number.
-
Multipath —Enable protocol-independent load balancing for Layer 3 VPNs. This allows the
forwarding next hops for both the active route and alternative paths to be used for load
balancing.