Static Route Arp Validation Check - Dell PowerConnect B-RX Configuration Manual

Syntax: arp <ip-add> <mac-addr>
The <ip-addr> parameter specifies the IP address of the device that has the MAC address of the
entry.
The <mac-addr> parameter specifies the MAC address of the entry.

Static route ARP validation check

Beginning with release 02.5.00, you can configure the device to perform validation checks on the
destination MAC address, the sender and target IP addresses, and the source MAC address.
You can enable ARP validation check on the global basis. When feature is enabled, the static route
will only be installed when the next hop ARP has been resolved.
Configuring an ARP validation check
To enable the ARP validation check globally, enter a command such as the following.
BigIron RX(config)#ip route validate-nexthop-arp
Syntax: [no] ip route validate-nexthop-arp
Use the no form of the command to disable the ARP validation feature. When ARP validation is
disabled, the static route will be installed without checking the validity of the next hop.
Enabling the next hop validate ARP timer
The next hop validate ARP timer works only on the ARP entries created when the ARP validation
check feature has been enabled. The timer is used to age out the ARP entries when the next hop
goes down. All other ARP entries in the system, which are NOT created due to static routes, follow
the normal ARP age timer with default value of 3 minutes.
Use the ARP validation timer to reduce the response time where the static route with the next hop
down can be replaced quickly with a route with active next hop.
To set the ARP validation timer to 30 seconds, enter commnads such as the following.
BigIron RX(config)#ip route validate-nexthop-arp
BigIron RX(config)#ip route validate-nexthop-arp timer 30
Syntax: [no] ip route validate-nexthop-arp timer <value>
The default is 200 seconds.
The value parameter speocifies the amount of time before a nexthop down is replaced by an active
nexthop. Possible values are10-200 seconds.
Use the no form of the command to disable the validation timer.
BigIron RX Series Configuration Guide
53-1001810-01
Configuring ARP parameters
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