
Configuring IP Services
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303528-A Rev 00
Using Site Manager
Enabling MTU Discovery on an Interface
A probe MTU is a request for the maximum transmission unit (MTU) size used on
all networks an IP datagram must traverse from source to destination.
By configuring IP to respond to probe MTUs on this interface, you eliminate
transit fragmentation and destination reassembly for datagrams destined for this
interface and, therefore, decrease network load.
The reply MTU and the probe MTU are options 11 and 12 in RFC 1063.
By default, IP does not respond to probe requests. You can use the BCC or Site
Manager to turn this feature on and off as required.
Site Manager Procedure
You do this System responds
1. In the Configuration Manager window,
choose
Protocols
.
The Protocols menu opens.
2. Choose
IP
. The IP menu opens.
3. Choose
Interfaces
. The IP Interface List window opens.
4. Click on the interface you want to edit. Site Manager displays the parameter
values for that interface in the IP Interface
List window.
5. Set the
Cost
parameter. Site Manager:
Cost parameter: page A-26
6. Click on
Apply
, and then click on
Done
. Site Manager returns you to the
Configuration Manager window.
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