Chapter 4 Configuring Bridging on the ML-Series Card

Configuring Bridging

If the destination address of the packet is known in the bridge table, the packet is forwarded on a single interface in the bridge group. If the packet’s destination is unknown in the bridge table, the packet is flooded on all forwarding interfaces in the bridge group. The bridge places source addresses in the bridge table as it learns them during the process of bridging.

Spanning tree is not mandatory for an ML-Series card bridge group, but if it is configured, a separate spanning-tree process runs for each configured bridge group. A bridge group establishes a spanning tree based on the bridge protocol data units (BPDUs) it receives on only its member interfaces.

Configuring Bridging

Beginning in global configuration mode, use the following steps to configure bridging:

 

Command

Purpose

Step 1

 

 

ML_Series(config)# no ip

Enables bridging of IP packets. This command needs to be

 

routing

executed once per card, not once per bridge-group. This step is

 

 

not done for IRB.

Step 2

 

 

ML_Series(config)# bridge

Assigns a bridge group number and defines the appropriate

 

bridge-group-number [protocol

spanning-tree type:

 

{drpi-rstp rstp ieee}]

• drpri-rstpis the protocol used to interconnect dual resilient

 

 

 

 

packet ring (RPR) to protect from node failure. Do not

 

 

configure this option on the ONS 15310-CL or

 

 

ONS 15310-MA ML-Series.

 

 

• rstp is the IEEE 802.1W Rapid Spanning Tree.

 

 

• ieee is the IEEE 802.1D Spanning Tree Protocol.

 

 

Note Spanning tree is not mandatory for an ML-Series card

 

 

bridge group, but configuring spanning tree blocks

 

 

network loops.

Step 3

 

 

ML_Series(config)# bridge

(Optional) Assigns a specific priority to the bridge, to assist in

 

bridge-group-number priority

the spanning-tree root definition. Lowering the priority of a

 

number

bridge makes it more likely that the bridge is selected as the root.

 

 

Step 4

 

 

ML_Series(config)# interface

Enters interface configuration mode to configure the interface of

 

type number

the ML-Series card.

Step 5

 

 

ML_Series(config-if)#

Assigns a network interface to a bridge group.

 

bridge-group

 

 

bridge-group-number

 

Step 6

 

 

ML_Series(config-if)# no

Changes the shutdown state to up and enables the interface.

 

shutdown

 

Step 7

 

 

ML_Series(config-if)# end

Returns to privileged EXEC mode.

Step 8

 

 

ML_Series# copy running-config

(Optional) Saves your entries in the configuration file.

 

startup-config

 

 

 

 

Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2

4-2

78-19415-01

 

 

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Cisco Systems ONS 15310-CL, Cisco ONS 15310-MA manual Configuring Bridging
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ONS 15310-CL, ONS 15310-MA, Cisco ONS 15310-MA specifications

Cisco Systems has long been a leader in networking and telecommunications technology, and among its impressive lineup of products, the Cisco ONS 15310 series stands out as an essential solution for optical networking. This series includes models such as the ONS 15310-MA, ONS 15310-CL, and ONS 15310-CA, each designed to meet the diverse needs of service providers and enterprises seeking to enhance their optical transport networks.

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