ATM Configuration and Troubleshooting Guide

Troubleshooting
Troubleshooting MPOA
Chapter 9258
host51:/> atmmgr 0 show
ATM/AAL vc information table
VPI,VCI PMP Type Use SEL Dest.IP Address AAL Index Status
---------------------------------------------------------------------------
0,5 No PVC Signaling 00 N/A 5 0 Up
0,16 No PVC ILMI 00 N/A 5 0 Up
0,234 No SVC LEC_to_LECS/LES 25 N/A 5 0 Up
0,235 Leaf SVC LEC_to_LECS/LES 25 N/A 5 1 Up
0,236 No SVC LEC_to_BUS 25 N/A 5 0 Up
0,237 Leaf SVC LEC_to_BUS 25 N/A 5 1 Up
0,239 No SVC LEC_to_LEC 25 * 5 2 Up
0,240 No SVC LLC LEC, MPC 26 * 5 0 Up
0,241 Leaf SVC LLC LEC, MPC 26 * 5 1 Up
0,242 No SVC LLC LEC, MPC 26 * 5 0 Up
The two first LLC LEC, MPC VCs (0,240 and 0,241) are connections
between the MPC component on the ATM host and the MPS component
somewhere in the network (usually on an MPOA-capable router). The
third one (0,242) is theshortcut betweeen the MPC on the ATM host and
the MPC on the destination system. You also see the usual LEC_to_LEC
VC (0,239) between the LEC on the ATM host and the LEC on the
router. This VC is normally set up before the shortcut is established and
will convey all the data traffic as long as a flow is not detected.
You can use another option of the atmmgr command to display more
information about a particular VC, which will help you determine which
ATM address the VC is connected to. The selector fields are also very
helpful in differentiating betweeen VCs.
Shown below is the LEC_to_LEC VC information. You can identify the
LEC selector (0x25), the router’s ATM address
(47000580ffe1000000f21c4c21.0000ef03a864), and the router’s LEC
selector (0x01), which is shown at the end of the ATM address. These
three pieces of information are shown in bold in the example below.
host51:/> atmmgr 0 show -v 0,239
ATM/AAL vc information
VPI,VCI : 0,239
Point_to_Multipoint: No
Type : SVC
Use : LEC_to_LEC