Troubleshooting Site Link Faults - Motorola DIMETRA MTS 2 Installation, Configuration And Basic Service Manual

Troubleshooting Site Link Faults

•
•
Troubleshooting Site Link Faults
Initial Verification
The suggested utility used to verify the IP pathway to the two Core Routers is the ping MMI command.
Pings should be attempted to both Core Routers using both the default ping packet size of 32 bytes as
well as using a packet size larger than the configured Frame relay fragmentation size. If router can
be successfully pinged using the default size of 32, but pings using the large size are unsuccessful,
this indicates an error in the configuration for Frame relay fragmentation.
ping 145.13.8.153
PING 145.13.8.153:
–––––145.13.8.153 PING Statistics-----
4 packets transmitted, 0 packets received, 100% packet loss
SC: PING 145.13.8.153:
PING 145.13.8.153:
32 bytes from 145.13.8.153:
32 bytes from 145.13.8.153:
32 bytes from 145.13.8.153:
32 bytes from 145.13.8.153:
–––––145.13.8.153 PING Statistics-----
4 packets transmitted, 4 packets received, 100% packet loss
round-trip (ms) min/avg/max = 20.747/20.904/21.216
SC: PING –l 128 145.13.8.153
PING 145.13.8.153:
128 bytes from 145.13.8.153:
128 bytes from 145.13.8.153:
128 bytes from 145.13.8.153:
128 bytes from 145.13.8.153:
–––––145.13.8.153 PING Statistics-----
4 packets transmitted, 4 packets received, 0% packet loss
round-trip (ms) min/avg/max = 50.441/51.019/51.340
Frame Relay Fragmentation
The status frf command displays fragmentation statistics as show below:
SC) status frf
Transmit Frames fragmented
Number of fragments transmitted
Number of received frames
Number of received fragments
Number of ignored fragments
Number of discards when disabled
13-14
The RAIM (Receiver Automatic Integrity Monitor) facility should be enabled to allow detection
and correction of GPS errors. Refer to the Tetra EBTS Service Software (TESS) User Guide.
If no other fault replaces the Site Controller.
32 byte packets
32 byte packets
32 byte packets
icmp_seq=0.
icmp_seq=1.
icmp_seq=2.
icmp_seq=3.
128 byte packets
time=21.216 ms
time=20.770 ms
time=20.882 ms
time=20.747 ms
icmp_seq=0. time=51.340 ms
icmp_seq=1. time=50.441 ms
icmp_seq=2. time=51.291 ms
icmp_seq=3. time=51.004 ms
126
12
4
8
0
0
Chapter 13: MTS Troubleshooting
6802800U74-N September 2009