
Customizing OSPF Services
117356-B Rev. 00
7-45
Specifying the MTU Size
OSPF recognizes a maximum transmission unit (MTU) size for updates
transmitted on an interface. By default, when you configure OSPF on an interface,
OSPF uses the MTU size specified for the type of network to which the interface
is connected.
Using Site Manager, you can configure OSPF to do the following:
• Send packets no larger than the IP MTU size for Ethernet (1500).
• Use the MTU size you specify. The number you enter must be less than the IP
MTU size for that physical interface.
Using the BCC
Navigate to an interface-specific OSPF prompt and enter:
mtu
size
Using Site Manager
Note:
When running OSPF over a synchronous/PPP link, set the MTU size to a
value less than the synchronous MTU size (1200). This setting allows all
OSPF routes to be learned over the link.
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
OSPF
. The OSPF menu opens.
4. Choose
Interfaces
. The OSPF Interfaces window opens.
5. Click on the OSPF interface you want. The parameter values for that interface appear
in the OSPF Interfaces window.
6. Set the
MTU Size
parameter. Site Manager:
MTU Size parameter: page A-73
7. Click on
Apply
, and then click on
Done
. Site Manager returns you to the Configuration
Manager window.
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