H3C Technologies H3C S10500 Series Switches - Manual (Page 172)

157
Disabling an interface from sending or receiving IS-IS packets
After being disabled from sending or receiving hello packets, an interface cannot form a neighbor
relationship, but can advertise directly connected networks in LSPs through other interfaces. This can save
bandwidth and CPU resources, and ensures other routers know networks directly connected to the
interface.
Follow these steps to disable an interface from sending and receiving IS-IS packets:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Disable the interface from sending
and receiving IS-IS packets
isis silent
Required
Not disabled by default
Enabling an interface to send small hello packets
IS-IS messages cannot be fragmented at the IP layer because they are directly encapsulated into frames.
Any two IS-IS neighboring routers must negotiate a common MTU. To avoid sending big hellos for saving
bandwidth, enable the interface to send small hello packets without CLVs.
Follow these steps to enable an interface to send small hello packets:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Enable the interface to send small
hello packets without CLVs
isis small-hello
Required
Standard hello packets are sent by
default.
Configuring LSP parameters
Configuring LSP timers
1. Specify the maximum age of LSPs
Each LSP has an age that decreases in the LSDB. Any LSP with an age of 0 is deleted from the LSDB. You
can adjust the age value based on the scale of a network.
Follow these steps to specify the maximum age of LSPs:
To do… Use the command… Remarks
Enter system view system-view —
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
—
Specify the maximum LSP age timer lsp-max-age seconds
Optional
1200 seconds by default