5. Troubleshooting
5-40
May
2003
9000-A2-GB33-20
Line Loopback (Network or 9520-ILM T3 User Port)
The Line Loopback (LLB) loops the information received on the selected interface
back to the source of the loopback. When used with a pattern test at the remote
node, LLB determines whether the problem is with the sending device or the T3
facility.
Main Menu
→
Test
→
Network Physical Tests
→
Line Loopback
Main Menu
→
Test
→
T3 User Port Physical Tests
→
Line Loopback
CAUTION:
This test may affect the operation of the frame relay PVCs assigned to
the selected port. While in loopback, the frame relay link will be down so
any IP data being sent while this test is active will be disrupted.
Framer
LLB
Network
Interface
00-16790