H3C Technologies H3C SR8800 - Manual (Page 48)

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Serial4/1/9/1:0 Up-Time:2007/06/29 11:07:29:167
Serial4/1/9/2:0 Up-Time:2007/06/29 11:07:29:192
# Check the state of MP-group 4/1/1.
[RouterA] display interface Mp-group 4/1/1
Mp-group4/1/1 current state: UP
Line protocol current state: UP
Description: Mp-group4/1/1 Interface
The Maximum Transmit Unit is 1200, Hold timer is 10(sec)
Internet Address is 6.0.0.1/24 Primary
Link layer protocol is PPP
LCP opened, MP opened, IPCP opened, OSICP opened
Physical is MP, baudrate: 18432000 bps
Last 300 seconds input: 84 bytes/sec 1 packets/sec
Last 300 seconds output: 80 bytes/sec 1 packets/sec
846 packets input, 61121 bytes, 0 drops
825 packets output, 61030 bytes, 0 drops
# Ping IP address 111.1.1.2 on Router A.
[RouterA] ping 111.1.1.2
PING 111.1.1.2: 56 data bytes, press CTRL_C to break
Reply from 111.1.1.2: bytes=56 Sequence=1 ttl=255 time=29 ms
Reply from 111.1.1.2: bytes=56 Sequence=2 ttl=255 time=31 ms
Reply from 111.1.1.2: bytes=56 Sequence=3 ttl=255 time=29 ms
Reply from 111.1.1.2: bytes=56 Sequence=4 ttl=255 time=30 ms
Reply from 111.1.1.2: bytes=56 Sequence=5 ttl=255 time=30 ms
--- 111.1.1.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 29/29/31 ms
Troubleshooting PPP configuration
A link cannot revert to the up state
Symptom
PPP authentication failed and the link cannot revert to the up state.
Analysis
This problem may arise if the parameters for authentication are incorrect.
Solution
Enable the debugging of PPP, and you will see the information describing that LCP went up upon a
successful LCP negotiation but went down after the PAP or CHAP negotiation. Check the PPP
authentication settings at the local and peer ends to make sure that they are consistent.