H3C Technologies H3C SR8800 - Manual (Page 51)

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Step Command Remarks
3. Enable HDLC encapsulation
on the interface.
link-protocol hdlc PPP is the default.
4. Set the link status polling
interval.
timer hold seconds
Optional.
HDLC uses timers to check link
status. The two ends of a link must
use the same link status polling
interval. Setting the link status
polling interval to zero disables
link status check.
The link status polling interval is 10
seconds by default.
NOTE:
Use the default link state polling interval or adjust it according to the network conditions. If the network has
a long delay or is experiencing congestion, you can increase the polling interval to avoid network
flapping.
HDLC configuration example
Network requirements
As shown in Figure 12 , Router A and Router B are connected through their POS ports with HDLC enabled.
Configure POS 3/1/1 of Router A to borrow the IP address of the local loopback interface, whose IP
address is with 32-bit mask.
Configure Router A to learn the routing information of Router B through static routes, and enable Router
A to reach the network segment 12.1.2.0/24.
Figure 12 Network diagram
Configuration procedure
1. Configure Router A:
system-view
[RouterA] interface LoopBack 1
[RouterA-LoopBack1] ip address 12.1.1.2 32
[RouterA-LoopBack1] quit
[RouterA] interface Pos 3/1/1
[RouterA-Pos3/1/1] clock master
[RouterA-Pos3/1/1] link-protocol hdlc
[RouterA-Pos3/1/1] ip address unnumbered interface LoopBack 1
[RouterA-Pos3/1/1] quit