Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual page 219

monitor vlan interface
Copyright © 2010, Juniper Networks, Inc.
By default, the router uses a 5-second time interval between polls to calculate bit
rates and packet rates for each specified VLAN subinterface. Optionally, you can use
the load-interval keyword to specify a nondefault time interval in the range 5–30
seconds.
You can also include the optional display-time-of-day keyword to show the time of
day at which the router gathers statistics for each interval. Displaying the time of day
enables you to monitor when a particular VLAN subinterface is underutilized or
overutilized.
Review the command output.
4.
host1#monitor vlan interface fastEthernet 0/0.1 fastEthernet 4/0.1
display-time-of-day
Interface
----------------------- -------- --------------- --------------- --------
FastEthernet 0/0.1
FastEthernet 4/0.1
FastEthernet 0/0.1
FastEthernet 4/0.1
FastEthernet 0/0.1
FastEthernet 4/0.1
The router polls each VLAN subinterface at the specified load interval (the default
5-second interval in this example) to calculate and display bit rate and packet rate
statistics. The first line of output for each interface always displays 0 (zero) for the
number of seconds between polls, and dashes (--/--) in the Input bps/pps and Output
bps/pps columns. These values indicate that the router initially takes a baseline for
each interface against which to measure subsequent statistics. The router continues
to display subsequent lines of output for each interface at the specified load interval
until you press Ctrl+c to stop the command.
For a description of each field in the monitor vlan interface command output, see
"monitor vlan interface" on page 187.
When you are finished, press Ctrl+c to stop the monitor vlan interface command.
5.
host1#^C
Use to display bit rate and packet rate statistics over a specified time interval for one
or more VLAN subinterfaces.
You must use the monitor vlan interface command in a dedicated console or terminal
session for the duration of the monitoring session.
Specify the interface identifier for each VLAN subinterface that you want to monitor.
To specify a nondefault time interval in the range 5–30 seconds at which the router
calculates bit rate and packet rate statistics, use the optional load-interval keyword.
The default time interval is 5 seconds.
To display the time at which the router calculates bit rate and packet rate statistics
for the current interval, use the optional display-time-of-day keyword.
Chapter 5: Configuring VLAN and S-VLAN Subinterfaces
Seconds
between
polls Input bps/pps
0 --/--
0 --/--
5 120240/100
5 120000/100
5 120240/100
5 120000/100
Time
Output bps/pps (UTC)
--/-- 10:50:07
--/-- 10:50:07
120240/100 10:50:12
120000/100 10:50:12
120240/100 10:50:17
120000/100 10:50:17
187