Cisco Catalyst 4500 series Administration Manual page 238

Understanding Virtual Switching Systems
All remote access is directed to the VSS Active supervisor engine, which manages the whole VSS.
If the VSS performs a switchover, Telnet over SSH sessions and web browser sessions are disconnected.
SNMP
The SNMP agent runs on the VSS Active supervisor engine.
CISCO-VIRTUAL-SWITCH-MIB is a new MIB for virtual switch mode and contains the following
main components:
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Command Console
Because the management plane of the two switches are common (that is, both switches in a VSS can be
configured and managed from Active switch itself), you do not require access to the Standby console.
However, the consoles of both switches are available by connecting console cables to both supervisor
engine console ports. Availability of the Standby console does not imply that you can configure the
switch from Standby console as well. Config mode is not available on the Standby and show commands
are limited in availability. Observe that all show commands, even for remote ports, are available on the
Active switch.
The console on the VSS Standby switch will indicate that switch is operating in VSS Standby mode by
adding the characters "-stdby" to the command line prompt. You cannot enter configuration mode on the
VSS Standby switch console.
The following example shows the prompt on the VSS Standby console:
Switch-standby> sh clock
*14:04:58.705 UTC Tue Nov 20 2012
Accessing the Remote Console on VSS
Remote console (the Standby's console) can be accessed from the Local (Active) switch. This is available
on a standalone system and works similarly on VSS. To access the remote console from the Active, you
can use the remote login command with a VSS-Standby module number. Observe that the module
number is a virtual slot and it would be an In-Chassis-Active supervisor module number on the remote
chassis.
Switch# remote login module 11
Connecting to standby virtual console
Type "exit" or "quit" to end this session
Because the Standby console is not available in config mode and only partially available in EXEC mode,
distributed features like Netflow and Wireshark have special exemptions for respective commands (that
is, these commands are allowed). Refer to
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)SG
5-22
cvsGlobalObjects — Domain #, Switch #, Switch Mode
cvsCoreSwitchConfig — Switch Priority
cvsChassisTable — Switch Role and Uptime
cvsModuleTable — Information on the physical modules listed in the ENTITY-MIB
entPhysicalTable, whose entPhysicalClass is module(9)
cvsVSLConnectionTable — VSL Port Count, Operational State
cvsVSLStatsTable — Total Packets, Total Error Packets
cvsVSLPortStatsTable — TX/RX Good, Bad, Bi-dir and Uni-dir Packets
9 Switch-standby-console>
Chapter 5
Chapter 65, "Configuring Flexible NetFlow"
Configuring Virtual Switching Systems
and Chapter 59,
OL-30933-01