Cisco Cisco IOS Software Release 12.2(27)SBC
MPLS Traffic Engineering—Automatic Bandwidth Adjustment for TE Tunnels
tunnel mpls traffic-eng auto-bw
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Cisco IOS Release: Multiple releases (see the Feature History table)
If you enter the tunnel mpls traffic-eng auto-bw command without the collect-bw keyword, the
tunnel’s bandwidth is adjusted to the largest average output rate sampled for the tunnel since the last
bandwidth adjustment for the tunnel was made.
tunnel’s bandwidth is adjusted to the largest average output rate sampled for the tunnel since the last
bandwidth adjustment for the tunnel was made.
To constrain the bandwidth adjustment that can be made to a tunnel, use the max-bw and min-bw
keywords and specify the permitted maximum allowable bandwidth and minimum allowable bandwidth,
respectively.
keywords and specify the permitted maximum allowable bandwidth and minimum allowable bandwidth,
respectively.
The no form of the tunnel mpls traffic-eng auto-bw command disables bandwidth adjustment for the
tunnel and restores the configured bandwidth for the tunnel bandwidth where “configured bandwidth”
is determined as follows:
tunnel and restores the configured bandwidth for the tunnel bandwidth where “configured bandwidth”
is determined as follows:
•
If the tunnel bandwidth was explicitly configured via the tunnel mpls traffic-eng bandwidth
command after the running configuration was written (if at all) to the startup configuration, the
“configured bandwidth” is the bandwidth specified by that command.
command after the running configuration was written (if at all) to the startup configuration, the
“configured bandwidth” is the bandwidth specified by that command.
•
Otherwise, the “configured bandwidth” is the bandwidth specified for the tunnel in the startup
configuration.
configuration.
Note
When you save the router configuration, the current bandwidth (not the originally configured bandwidth)
is saved for tunnels with automatic bandwidth enabled.
is saved for tunnels with automatic bandwidth enabled.
Note
Each tunnel mpls traffic-eng auto-bw command supersedes the previous one. Therefore, if you want
to specify multiple arguments for a tunnel, you must specify them all in a single tunnel mpls traffic-eng
auto-bw command.
to specify multiple arguments for a tunnel, you must specify them all in a single tunnel mpls traffic-eng
auto-bw command.
Note
Keywords for the tunnel mpls traffic-eng auto-bw command are order-dependent; you must enter them
in the order in which they are listed in the command format.
in the order in which they are listed in the command format.
Examples
The following example shows how to enable automatic bandwidth adjustment for tunnel102 and specify
that the adjustments are to occur every hour:
that the adjustments are to occur every hour:
Router(config)# interface tunnel102
Router(config-if)# tunnel mpls traffic-eng auto-bw frequency 3600
Related Commands
Command
Description
mpls traffic-eng auto-bw timers
Enables automatic bandwidth adjustment on a platform for
tunnels configured for bandwidth adjustment.
tunnels configured for bandwidth adjustment.
tunnel mode mpls traffic-eng
Sets the mode of a tunnel to MPLS for traffic engineering.
tunnel mpls traffic-eng bandwidth
Configures bandwidth required for a MPLS traffic engineering
tunnel.
tunnel.