Specifications

9-38
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 9 Ethernet Operation
E Series VLAN Support
Figure 9-30 The priority queuing process
9.6.3 E Series VLAN Membership
This section explains how to provision Ethernet ports for VLAN membership. For initial port
provisioning (prior to provisioning VLAN membership) see the “E Series Port Provisioning” section on
page 9-10.
Caution ONS 15454s propagate VLANs whenever a node appears on the same network view of another node
regardless of whether the nodes connect through DCC. For example, if two ONS 15454s without DCC
connectivity belong to the same Login Node Group, then whenever CTC gets launched from within this
login node group, VLANs propagate from one to another. This happens even though the ONS 15454s do
not belong to the same SONET ring.
Table 9-7 Priority Queuing
User Priority Queue Allocated Bandwidth
0,1,2,3 Low 30%
4,5,6,7 High 70%
Data Flow
No priority
ONS node maps a frame
with port-based priority using
a Q-tag.
The receiving ONS node
removes the Q-tag and
forwards the frame.
ONS node uses a Q-tag to
map a frame with priority and
forwards it on.
The receiving ONS node
receives the frame with a
Q-tag and forwards it.
Priority tag
removed
Priority
Priority
Priority
Same
priority
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