Avaya Configuring IP, ARP, RARP, RIP, and OSPF Services Uživatelský manuál Strana 268

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Configuring IP, ARP, RARP, RIP, and OSPF Services
A-6
308627-14.20 Rev 00
Parameter: Cost
Path: Configuration Manager > Protocols > IP > Interfaces
Default: 1
Options: 1 to the value of the RIP diameter (maximum 127)
Function: Sets the cost of this interface. The interface cost is added to routes learned on
this interface through RIP and is specified as the cost of this network in RIP
packets transmitted out other interfaces.
Instructions: Enter the interface cost value (standard RIP implementation assigns a cost of 1);
however, keep in mind that increasing this value causes the upper bound set by
the RIP Diameter parameter to be attained more rapidly.
MIB Object ID: 1.3.6.1.4.1.18.3.5.3.2.1.4.1.8
Parameter: MTU Discovery
Path: Configuration Manager > Protocols > IP > Interfaces
Default: Disabled
Options: Enabled
|
Disabled
Function: Specifies whether path MTU (maximum transmission unit) discovery
(RFC 1191) is enabled on this interface. When this option is enabled, the Do
Not Fragment (DF) bit in the IP header is set for all datagrams going out the
interface. If any datagram is too large to be forwarded without fragmentation by
some router along the path, that router will discard it and return an ICMP
destination unreachable message with a code indicating that fragmentation is
required and that the DF bit is set. The MTU of the nonconforming hop is also
provided. Upon receipt of this message, the source host reduces its path MTU
for the path. This parameter essentially guarantees that the host will not receive
any fragments from a peer doing path MTU discovery.
Instructions: Select Enabled to enable path MTU discovery on this interface; select Disabled
to disable the option on this interface.
MIB Object ID: 1.3.6.1.4.1.18.3.5.3.2.1.24.1.12
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