Owners Manual

Layer 3 routing

OpenSwitch OPX supports unicast routing over Linux interfaces using routes in the Linux kernel routing table. Applications can also use the

CPS API to congure routes. This information describes how to congure Layer 3 unicast routing to provision the NPU.

The OpenSwitch OPX routing subsystem manages the forwarding information base (FIB). The routing subsystem programs routes with

resolved next hops using ARP/Neighbor table entries received from the Linux kernel.

Topics:

• IPv4 routing

• IPv6 routing

• Neighbor table entries

• Next-hop routing

• L3 routing topology

• Quagga routing

• Routing using Quagga

IPv4 routing

Use the iproute command to create a route. A routing table entry consists of a destination IP address prex and at least one next-hop

address or a Linux interface.

Congure static route

$ ip route show

default dev eth0 scope link

3.3.3.0/24 dev e101-003-0 proto kernel scope link src 3.3.3.1

$ ip route add 11.10.10.0/24 dev e101-003-0

Layer 3 routing 13