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Cisco ONS 15310-CL and Cisco ONS 15310-MA Ethernet Card Software Feature and Configuration Guide R8.5
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Chapter 14 Configuring Resilient Packet Ring on the ML-Series Card
Configuring RPR
Creating the Bridge Group and Assigning the Ethernet and SPR Interfaces
The default behavior of the ML-Series cards is that no traffic is bridged over the RPR even with the
interfaces enabled. This is in contrast to many Layer 2 switches, including the Cisco Catalyst 6500 and
the Cisco Catalyst 7600, which forward VLAN 1 by default. The ML-Series card will not forward any
traffic by default, including untagged or VLAN 1 tagged packets.
For any RPR traffic to be bridged on an ML-Series card, a bridge group needs to be created for that
traffic. Bridge groups maintain the bridging and forwarding between the interfaces on the ML-Series
card and are locally significant. Interfaces not participati ng in a bridge group cannot forward bridged
traffic.
To create a bridge group for RPR, you determine which Ethernet interfaces need to be in the same bridge
group, create the bridge group, and associate these interfaces with the bridge group. Then associate the
SPR interface with the same bridge group to provide transport across the RPR infrastructure.
Figure 14-6 illustrates a bridge group spanning the ML-Series card interfaces, including the SPR virtual
interface of RPR.
Figure 14-6 RPR Bridge Group
Caution All Layer 2 network redundant links (loops) in the connecting networ k, except the RPR topology, must
be removed for correct RPR operation. Or if loops exist, you must configure STP/RSTP.
To configure the needed interfaces, perform the following procedure, beginning in global configuration
mode:
ML-Series Card
134983
Ethernet
Port 0
Ethernet
Port 1
Bridge Group
POS 0
POS 1
SPR (RPR)
Interface
Command Purpose
Step 1 Router(config)# interface
type number
Enters interface configuration mode for the Ethernet
interface joining the bridge group.
Step 2 Router(config-if)# no shutdown Enables the interface.
Step 3 Router(config-if)# bridge-group
bridge-group-number
Creates the specified bridge group and assigns the bridge
group to the interface. Creating the bridge from the
interface configuration disables STP or RSTP
(spanning-disabled), which is recommended for RPR.
Step 4 Router(config)# interface spr1 Enters interface configuration mode for the SPR
Step 5 Router(config-subif)# bridge-group
bridge-group-number
Associates the SPR interface to the specified bridge
group.