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FINAL DRAFT —Cisco Confidential
6-11
Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-17502-01
Chapter 6 Troubleshooting the Cisco IOS XR Software
Interfaces Not Coming Up
Clearing Configuration Sessions
Active configuration sessions and their associated target configurations can consume system memory.
Users with the appropriate access privileges can display the open configuration sessions of other users
and terminate those sessions, if necessary (see
Table 6-2).
In the following example, the open configuration sessions are displayed with the show configuration
sessions command. The clear configuration sessions command is then used to clear a configuration
session.
RP/0/RSP0/CPU0:router# show configuration sessions
Session Line User Date Lock
00000211-002c409b-00000000 con0_RSP1_CPU0 UNKNOWN Mon Feb 2 01:02:09 2004
RP/0/RSP0/CPU0:router# clear configuration sessions 00000211-002c409b-00000000
session ID '00000211-002cb09b-00000000' terminated
Contacting TAC for Additional Assistance
If you remove configurations and the low-memory condition remains, you may need to contact TAC for
additional assistance. See the
“Additional Sources for Information” section on page 6-1.
Interfaces Not Coming Up
The router interfaces are directly used in processing network traffic, so their status information is crucial
to understanding how the device is functioning. This section contains information on the EXEC mode
commands used to verify that the router interfaces are operational. The basic commands used in this
process are summarized in
Table 6-3.
Ta ble 6-2 Session Commands
Command Description
show configuration sessions Displays the active configuration sessions.
clear configuration sessions session-id Clears a configuration session.
Ta ble 6-3 show interface Commands
Command Description
show interfaces Displays detailed information about all interfaces installed or
configured on the device, whether or not they are operational.
show interfaces type instance Specifies a particular interface, rather than displaying information for
all interfaces, as in the following example:
show interface gi0/1/0/0
show ipv4 interface Displays basic, IP-related information for all available interfaces.
show ipv4 interface brief Quickly displays the most critical information about the interfaces,
including the interface status (up or down) and the protocol status.