User Manual

OSPF and OSPFv3
403
M6100, M5300, and M7100 Series Managed Switches
17. Configure MTU Ignore by selecting Enable or Disable from the list.
MTU Ignore disables OSPF MTU mismatch detection on received database description
packets. The default value is Disable (MTU mismatch detection is enabled).
18. Configure Passive Mode by selecting Enable or Disable from the list.
Make an interface passive to prevent OSPF from forming an adjacency on an interface.
OSPF advertises networks attached to passive interfaces as stub networks. Interfaces
are not passive by default, meaning that the passive mode default is Disable.
19. IIn the OSPF Network Type list, select Broadcast or Point-to-Point.
OSPF selects a designated router and originates network LSAs only for broadcast
networks. No more than two OSPF routers can be present on a point-to-point link. The
default network type for Ethernet interfaces is broadcast.
20. Select an Authentication Type other than None by selecting from the list.
The choices are as follows:
• None. This is the initial interface state. If you select this option from the list, no
authentication protocols are run. The default is None.
• Simple. You are prompted to enter an authentication key. This key is included, in the
clear, in the OSPF header of all packets sent on the network. All routers on the
network must be configured with the same key.
• Encrypt. You are prompted to enter an authentication key and an authentication ID.
Encryption uses the MD5 Message-Digest algorithm. All routers on the network must
be configured with the same key and ID.
21. Enter the Authentication Key ID to be used for authentication.
You are prompted to enter an ID only if you select Encrypt as the authentication type. The
ID is a number between 0 and 255, inclusive.
22. In the Metric Cost field, enter the link cost.
OSPF uses this value in computing shortest paths. The range is from 1 to 65,535. The
default is 1.
23. Click the Apply button.
The updated configuration is sent to the switch. Configuration changes take effect
immediately.
The following table describes the nonconfigurable data that is displayed.
Table 149. OSPF Interface Configuration
Field Description
IP Address The IP address of the interface.
Subnet Mask The network mask, indicating the portion of the IP address that identifies the
attached network.