Avaya Configuring IP, ARP, RIP, and OSPF Services Uživatelský manuál Strana 256

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Configuring IP, ARP, RARP, RIP, and OSPF Services
A-6
308627-14.00 Rev 00
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 of the datagrams are too large to be forwarded without
fragmentation by some router along the path, that router will discard them 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
non-conforming 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
Parameter: ASB
Path: Configuration Manager > Protocols > IP > Interfaces
Default: Disabled
Options: Enabled
|
Disabled
Function: Specifies whether the IP router floods all-subnet broadcast (ASB) datagrams it
receives out this interface. An ASB datagram has a destination address equal to
the broadcast address for an entire network (all subnets). For example, if a
network interface serves the subnet 128.10.2.1 with a subnet mask of
255.255.255.0, the IP router considers any datagram with a destination address
of 128.10.255.255 or 128.10.0.0 to be an ASB datagram.
Instructions: Specify Enabled if you want the IP router to flood ASBs out this interface;
specify Disabled to prevent the router from flooding ASBs out this interface.
MIB Object ID: 1.3.6.1.4.1.18.3.5.3.2.1.24.1.14
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