
Configuring IP Services
3-32 114065 Rev. A
With Proxy ARP enabled, the router will respond with an ARP reply if there is a
valid route (that is, if the router is able to forward traffic) to the destination in the
routing table. This route may be a subnet route or a default route. For the router to
respond for subnets that are reachable via the default route, you must use Site
Manager to configure IP to use a default route for unknown subnets.
There are devices that use Proxy ARP to determine a gateway rather than relying
on a statically defined default gateway. These devices will use ARP for all remote
destinations.
To enable the router to reply to ARP for remote destinations on other networks,
you must enable Proxy ARP and use Site Manager to set the Nonlocal ARP
Destination parameter to Accept.
Timing Out Entries in the Address Resolution Cache
IP maintains an address resolution cache on each interface that is configured with
ARP or Proxy Arp. The address resolution cache contains host physical addresses
learned by means of ARP or Proxy ARP.
If you enable the cache timeout feature on this interface, the IP router removes
address resolution cache entries that have not been accessed within the specified
number of seconds. Once an entry is removed, the IP router must use ARP to
re-acquire the physical-level address.
By default, the cache timeout feature is disabled on the interface. You can use Site
Manager to enable the feature and to specify a timeout interval (in seconds).
Site Manager: Proxy parameter: page A-28
Site Manager: Enable Default Route for Subnets parameter: page A-44
Site Manager: Nonlocal ARP Destination parameter: page A-41
Comentarios a estos manuales