Cisco WS-X6416-GE-MT - Interface Module - Expansion Manual de usuario descargar pdf (Pagina 26)

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Set spantree mst config name MST revision 1

Set spantree mst instance vlan vlan

Set spantree mst config commit

Set spantree mode mst

IOS(config)#spanning-tree mode mst

IOS(config)#spanning-tree mst configuration

IOS(config-mst)#name MST revision 1

instance 1 vlan 3

IEEE 802.1W (Rapid PVST+)

RSTP reduces the reconvergence time of a network by selecting a single switch to act as the root

of a spanning tree. It is based on the IEEE standard 802.1w rather than IEEE 802.1D. Rapid

PVST+ is configured in the same manner as PVST+, but with the additional syntax:

Cisco Catalyst OS Cisco IOS Software

Set spantree mode rapid-pvst+

Set spantree link-type mod/port point-to-point

IOS(config)#spanning-tree mode rapid-pvst

Note: Command syntax in the Cisco Catalyst OS uses rapid-pvst+ and Cisco IOS Software

uses rapid-pvst.

Root and BPDU Guard Configuration

Port-based BPDU Guard monitors BPDUs on ports. If BPDUs are detected on access ports, the

configured interfaces are shut down. Reception of a BPDU by a PortFast-configured interface

signals an invalid configuration, such as the connection of an unauthorized device. The BPDU

Guard feature provides a secure response to invalid configurations since the interface is reenabled

manually by the administrator or automatically using the error-disable feature.

The spanning-tree root guard feature forces an interface to become a designated port, and if any

device accessible through the interface tries to become the root bridge, the root guard feature puts

the interface into the root-inconsistent (blocked) state.

Cisco IOS Software supports BPDU Guard and Root Guard feature on switchports only. The

configuration dialog below highlights configuration differences.

Cisco Catalyst OS Cisco IOS Software

set spantree bpdu-guard 3/1 enable

set spanning-tree guard root 1/1

show spantree summary

IOS(config)# int range fast3/1

IOS(config-if)# switchport

IOS(config-if)# spanning-tree portfast bpduguard

IOS(config-if)# spanning-tree guard root

IOS# show spanning-tree summary

EtherChannel

in the Cisco Catalyst OS and Cisco IOS Software bundles individual Ethernet links

into a single logical link to provide bandwidth aggregation and link resilience in a network. Cisco

Catalyst 6500 Ethernet interfaces support up to eight interfaces per EtherChannel group with all

interfaces at the same speed: 10,100, 1000, or 10,000 Mbps. EtherChannel groups can include

ports on any combination of line cards.

EtherChannel Operation

Configuring EtherChannel groups in Cisco IOS Software is a two-step process: first the ports are

assigned to a channel-group, and then the virtual interface port channels are configured. The

virtual interface port-channel behaves like a physical interface. In both the Cisco Catalyst OS and

Cisco IOS Software, all configurations on the port channel interfaces are propagated to the

physical interfaces of the port channel. For example, shutting the port channel interface will shut all

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