Switch 7700 Configuration Guide, v2

84 CHAPTER 5: ROUTING PROTOCOL OPERATION
Perform the following configuration in VLAN interface view.
By default, P2P and broadcast interfaces send Hello packets every 10 seconds, and
P2MP and NBMA interfaces send the packets every 30 seconds.
Set a Dead Timer for the Neighboring Routers
The dead timer of neighboring routers refers to the interval after which a router
considers a neighboring router dead if no hello packet is received from it. You can
set a dead timer for the neighboring routers.
Perform the following configuration in VLAN interface view.
By default, the dead interval for the neighboring routers of P2P or broadcast
interfaces is 40 seconds and for the neighboring routers of P2MP or NBMA
interfaces is 120 seconds.
Note that both hello and dead timers restore the default values if you modify the
network type.
Configure an Interval Required for Sending LSU Packets
Trans-delay seconds should be added to the aging time of the LSA in an LSU
packet. Setting the parameter like this mainly considers the time duration that the
interface requires for transmitting the packet.
You can configure the interval for sending LSU messages. Obviously, more
attention should be paid to this item over low speed network.
Perform the following configuration in VLAN interface view.
Tab le 30 Set Hello Timer and Poll Interval
Operation Command
Set the hello interval of the
interface
ospf timer hello seconds
Restore the default hello of the
interface
undo ospf timer hello
Set the poll interval on the NBMA
interface
ospf timer poll seconds
Restore the default poll interval undo ospf timer poll
Tab le 31 Set a Dead Timer for the Neighboring Routers
Operation Command
Configure a dead timer for the
neighboring routers
ospf timer dead seconds
Restore the default dead interval of
the neighboring routers
undo ospf timer dead
Tab le 32 Configure an Interval for LSU packets
Operation Command
Configure an interval for
sending LSU packets
ospf trans-delay seconds
Restore the default interval of
sending LSU packets
undo ospf trans-delay