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Default Gateway - Option 3
Allows the identification of a local default gateway (i.e. router). The "Default gateway" must reside on the same
network, and subnet (if used), as defined by the IP address for the bridge/router. Messages destined for hosts not on
this (sub-)network are forwarded to the default gateway.
When an SNMP message is to be sent to an NMS, first the routing table is checked for a known route. If a route to
the NMS is unknown, the SNMP message will then be sent to the default gateway. If the default gateway cannot
provide the best route it will send the message to the gateway that can provide the best route. After the default
gateway sends the message to the other gateway for delivery, the default gateway will send an ICMP Redirect
message back to the bridge/router that points to the best route gateway. In this manner, the bridge/router is
informed of the best route for future SNMP message delivery.
A configured Default Gateway will override a default route learned from RIP.
Default:
[none]
ARP Aging Timer - Option 4
Sets the ARP (Address Resolution Protocol) aging timer. Upon the expiration of the ARP aging timer, unused
entries are removed from the ARP cache.
Default:
[2 min]
Range:
1 to 1440 minutes (1 day)
ARP Retry Timer - Option 5
Sets the time-out value after which an ARP message will be resent.
Default:
[2 sec]
Range:
1 - 20 seconds
Address Mask Response - Option 6
Determines if an Address Mask Reply will be sent as a response to an Address Mask Request.
Default:
[enabled]
DI-1135 X.25 Bridge/Router Menu Reference Manual
X.25 Menus: Internet Set-Up Menu
55
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