Mac Address And Vlan Support; Figure 17-4 Cisco Proprietary Rpr Frame Fields; Table 17-1 Definitions Of Rpr Frame Fields - Cisco ONS 15454 SDH Configuration Manual

MAC Address and VLAN Support

Figure 17-4
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Destination ID
PRI
Wrap Station
Table 17-1
Field
Destination Station
Source Station
PRI
DE
TTL
Type
MAC Address and VLAN Support
Cisco proprietary RPR increases the total number of MAC addresses supported because the MAC IDs of
packets that pass through an ML-Series card are not recorded by that ML-Series card. The ML-Series
card only records the MAC IDs of the packets that are bridged or stripped by that ML-Series card. This
allows a greater number of MAC addresses in the collective address tables of the Cisco proprietary RPR.
VLANs on Cisco proprietary RPR require less interface configuration than VLANs on STP and RSTP,
which require configuration on all the POS interfaces in the ring. Cisco proprietary RPR VLANs only
require configuration on SPR interfaces that bridge or strip packets for that VLAN.
Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, R8.0
17-6
Cisco Proprietary RPR Frame Fields
Protocol (RPR V1)
Destination Station
Source ID Source Station
D
W B D TTL
E
D D
V RSVD Type
W S
Payload (Ethernet Frame)
Definitions of RPR Frame Fields
Definition
An eight-bit field specifying the MAC address of a specific ML-Series card in
the Cisco proprietary RPR as the destination. It has two well-known addresses:
0xff for Multicast DA-MAC and 0x00 for Unknown DA-MAC.
An eight-bit field specifying the MAC address of a specific ML-Series card in
the Cisco proprietary RPR as the source.
A three-bit QoS class of service (CoS) field that establishes Cisco proprietary
RPR priority.
A one-bit field that specifies the discard eligible flag.
A nine-bit field that specifies the frame's time to live.
A field indicating whether the packet is data or control.
Chapter 17 Configuring Cisco Proprietary Resilient Packet Ring