Related 
Commands
monitor session – Creates a session for monitoring.
show monitor session – Displays a monitor session.
source (port monitoring)
Configure a port monitor source.
C-Series, E-Series, S-Series, Z-Series
Syntax
source interface destination interface direction {rx | tx | 
both}
To disable a monitor source, use the no source interface destination 
interface direction {rx | tx | both} command.
Parameters
interface
Enter the one of the following keywords and slot/port information:
• For a 1-Gigabit Ethernet interface, enter the keyword 
GigabitEthernet followed by the slot/port information.
• For a 10-Gigabit Ethernet interface, enter the keyword 
TenGigabitEthernet followed by the slot/port 
information.
• For a 40-Gigabit Ethernet interface, enter the keyword 
fortyGigE followed by the slot/port information.
• For a SONET interface, enter the keyword sonet followed by 
the slot/port information.
destination Enter the keyword destination to indicate the interface 
destination.
direction {rx | tx | 
both}
Enter the keyword direction followed by one of the packet 
directional indicators.
• rx: to monitor receiving packets only.
• tx: to monitor transmitting packets only.
• both: to monitor both transmitting and receiving packets.
Defaults none
Command Modes MONITOR SESSION (conf-mon-
sess-session-ID
)
Command History
Version 8.3.11.1 Introduced on the Z9000.
Version 8.5.1.0 Added support for 4-port 40G line cards on ExaScale.
Version 8.1.1.0 Introduced on the E-Series ExaScale.
Version 7.7.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
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