Troubleshooting guide

6-44
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 6 Troubleshooting Switch Router ATM Network Connections
Troubleshooting PNNI SVCC-RCC and Higher-level Links
For example, if the RCC is listed as UP, but the HrzLn State (Horizontal Link State) is other than 2way,
the following subset of aggregated horizontal link states might indicate conditions that you can correct
if they remain unchanged for an extended period:
• DOWN—No uplink PTSEs have been received that include an uplink to the neighboring peer LGN
with the same aggregation value as listed in a hello message. See the Troubleshooting PNNI
Hierarchical Networks.
• AT TEMP T—Although at least one uplink PTSE has been received, including an uplink to the
neighbor peer LGN with the listed aggregation token, no valid confirming information has recently
been received piggybacked onto the peer hello message.
• 1 WAY—Hellos have recently been received confirming the aggregation token from a neighbor peer
LGN, but the neighbor has not acknowledged the information that the local side transmitted. See the
“Debugging SVCC-RCC and Higher-level Link Problems” section on page 6-46.
Step 2 Verify that the neighbor peer LGN has reached the full state for its database synchronization by using
the show atm pnni neighbor command. If it has not, see the “Checking PNNI Neighbor Database
Synchronization” section on page 6-30. If the neighbor has reached the full state but the horizontal link
remains in the attempt state, see the “Checking SVCC-RCC Status” section on page 6-44.
Checking SVCC-RCC Status
This section describes troubleshooting the status of SVCC-RCCs from a local LGN node to all of its
LGN peers.
Use the following commands to confirm the status of SVCC-RCCs from a local LGN node:
Follow these steps to troubleshoot the status of SVCC-RCCs from a local LGN node to all of its
LGN peers:
Step 1 Use the show atm pnni svcc-rcc local-node detail command to confirm the status of SVCC-RCCs from
a local LGN node.
Step 2 Confirm that the RCC state is UP (with SVCC setup state shown as SVCC_UP for the detailed display).
Make a note of whether this is the calling side or the called side as shown on the same display line where
the SVCC setup state appears.
Step 3 If the RCC state is up, but the hello state is not 2way_in, proceed to the next section, “Checking
SVCC-RCC Hello State.” Otherwise, if the RCC state is not up, continue with these checks.
Note The LGN with the higher node ID is the calling side originator of the signaling messages that
set up the SVCC-RCC.
Command Purpose
show atm pnni svcc-rcc local-node detail Confirms the status of SVCC-RCCs from
a local LGN node to all of its LGN peers.
show version Confirms the route processor card has
sufficient memory to support the software
version.