Brocade Communications Systems FastIron X Series User Manual

Conguring static ARP for Multi-VRF
The interface associated with an ARP entry determines to which VRF the ARP entry belongs.
An ARP entry is dened by the following parameters:
• IP address
• MAC address
• Type
• Interface
1. The following example illustrates how to congure static ARP on default VRFs on an Ethernet interface.
device(config)# arp 192.168.1.100 0000.2344.2441 eth 1/7/1
2. The following example illustrates how to
congure static ARP on nondefault VRFs.
NOTE
The arp command can be used to congure static-ARP entries on a nondefault VRF interface. The VRF command
does not require an ARP index before a static-ARP is congured. The arp command is available in the address-family
mode for a particular VRF.
The arp command is backward compatible from FastIron release 08.0.00a, which uses a new command format. In releases
prior to FastIron release 08.0.00a, static-ARP needed an index. For FastIron 08.0.00a and later releases, FastIron accepts the
use of indexes as well as the new command without the index.
device(config)#
device(config)# vrf customer-1
device(config-vrf-customer-1)# address-family ipv4
device(config-vrf-customer-1-ipv4)# arp 1.1.1.1 0004.8044.5566 ethernet 1/7/8
device(config-vrf-customer-1-ipv4)# exit-address-family
device(config-vrf-customer-1)# exit-vrf
device(config)#
Conguring additional ARP features for Multi-VRF
This section discusses options for
conguring proxy ARP and ARP rate limiting.
Proxy ARP allows a Layer 3 switch to answer ARP requests from devices on one subnet on behalf of devices in another network. Proxy
ARP is congured globally and can be further congured per interface. Interface-level conguration overrides the global conguration.
With the proxy-arp command congured, a router does not respond to ARP requests for IP addresses in the same subnet as the
incoming ports. The local-proxy-arp command permits the router to respond to ARP requests for IP addresses within the same subnet
and to forward all trac between hosts in the subnet. The local-proxy-arp command is an interface-level conguration that has no VRF-
related impact.
ARP rate limiting is congured globally and applies to all VRFs.
ARP age can be congured globally and on a Layer 3 interface. An ARP age timer congured on a Layer 3 interface overrides the global
conguration for ARP aging. The aging timer ensures that the ARP cache does not retain learned entries that are no longer valid.
To congure proxy ARP globally:
device(config)# proxy-arp
Conguring Multi-VRF
FastIron Ethernet Switch Layer 3 Routing
53-1003627-04 569

Brocade Communications Systems FastIron X Series Specifications

General

Brand	Brocade Communications Systems
Model	FastIron X Series
Category	Switch
Language	English