Brocade Communications Systems ICX 7250 series, Configuration Manual

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Syntax: clear ip tunnel { pmtud tunnel-ID | stat tunnel-ID }
Use the pmtud option to reset a dynamically-configured MTU on a tunnel Interface back to the configured value.
Use the stat option to clear tunnel statistics.
The tunnel-ID variable is a valid tunnel number or name.
Use the clear statistics tunnel command to clear GRE tunnel statistics for a specific tunnel ID number. To clear GRE tunnel statistics for
tunnel ID 3, enter a command such as the following.
device(config)# clear statistics tunnel 3
Syntax: clear statistics tunnel [ tunnel-ID ]
The tunnel-ID variable specifies the tunnel ID number.
Bandwidth for IP interfaces
The bandwidth for an IP interface can be specified so that higher level protocols, such as OSPFv2 and OSPFv3, can use this setting to
influence the routing cost for routes learned on these interfaces.
When the interface bandwidth is configured, the number of network and router link state advertisement generation is reduced during an
operation down or a shutdown of one or more of the associated interfaces of the VE interface. For OSPF, when the dynamic cost feature
is enabled, the bandwidth for a VE interface is the sum of bandwidth for either all associated ports or all active associated ports. However,
when the interface bandwidth is configured on the VE interface itself, the bandwidth of the associated ports are not used in the OSPF
cost calculation. This means that even when one of the associated ports of the VE interface goes down, there is no OSPF cost
recalculation.
The bandwidth for IP interfaces feature can be configured for a physical interface, Link aggregation (LAG) groups, a VE interface, and a
tunnel interface.
The bandwidth for IP interfaces feature can be used to:
• Query the bandwidth for an interface.
• Help OSPF avoid generating numerous LSAs while updating the cost value for a VE interface due to changes in associated
physical interfaces.
• Influence the cost on OSPF interfaces for specific tunnels, VE interfaces, and physical interfaces.
The bandwidth for IP interfaces feature enables OSPF to calculate its interface metric cost more precisely, based on the specified
interface bandwidth. If the interface bandwidth feature is disabled, OSPF calculates the cost as the reference-bandwidth divided by the
fixed port bandwidth, as outlined in the
Changing the reference bandwidth for the cost on OSPFv2 interfaces on page 232 section.
When the interface bandwidth feature is enabled, OSPF calculates the cost as the reference-bandwidth divided by the interface
bandwidth. For a physical interface, the interface bandwidth is assigned by default to the port speed.
The interface bandwidth feature also enables OSPF to use the configured interface bandwidth for a VE interface to calculate its routing
metric, without considering the bandwidth of the associated physical ports. When this feature is enabled, the bandwidth for a VE interface
is the interface bandwidth value if it is configured under the VE. Alternatively, it is the sum of the interface bandwidth for all associated
ports or all active ports when OSPF dynamic cost is enabled.
The bandwidth of a trunk port for OSPF is, by default, the sum of either all the associated ports or all active associated ports when OSPF
dynamic cost is enabled. The interface bandwidth of the primary port is used if the interface bandwidth is configured; otherwise it reverts
to the default behavior.
Bandwidth for IP interfaces
Brocade FastIron Layer 3 Routing Configuration Guide
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