Juniper JUNOSE SOFTWARE 11.2.X - LINK LAYER CONFIGURATION GUIDE 7-7-2010 Configuration Manual page 219

monitor vlan interface
Copyright © 2010, Juniper Networks, Inc.
For information about specifying interface identifiers for VLAN subinterfaces
configured over Ethernet interfaces, see "VLAN Overview" on page 167. For information
about specifying interface identifiers for VLAN subinterfaces configured over LAG
bundles, see "Configuring a VLAN Subinterface for a LAG Bundle" on page 202.
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.
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