Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 299)

Multi-Service IronWare Switching Configuration Guide 269
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Adding and removing VLANs and ESIs
10
Configuration mismatch - forwarding behavior
The same ISID value must be configured on ingress and egress devices. Typically, when the MPLS
egress device receives the first packet, the CAMs are programmed so that forwarding can be done
in hardware. If there is a configuration mismatch, if the MPLS egress device has received a packet
with an ISID that is not the same as the configured ISID, the software can detect the mismatch and
not program the CAMs. This will cause the packets to be discarded.
NOTE
If the first packet arrived with the right ISID, the CAMs will be programmed as expected.
Subsequently, if the packet arrives with an incorrect ISID, it will not be possible for the hardware to
detect the mismatch and packets will be forwarded to the VPLS endpoint with the incorrect ISID.
When CPU protection is enabled, broadcast or unknown unicast packets will continue to be
forwarded even when they arrive with an incorrect ISID.
Adding and removing VLANs and ESIs
Use Figure 38 and the tables in this section for information about adding and removing VLANs and
ESIs. Refer to the “Association of ESI and VLAN for different stages” chapter for additional
information.
FIGURE 38 Association of ESI and VLAN for different stages
Adding a VLAN to an ESI
TABLE 44 Adding a VLAN to an ESI
Elementn ESI encapsulation Configuration Duplicates Decision
Add CVLAN CVLAN
•
No duplicate within same
ESI
•
No duplicates among
other client ESIs of this
ESI's parent
OK
Add SVLAN SVLAN No client ESI defined,
No I-ESI provider ESI
defined
•
No duplicate within same
ESI
•
No duplicates across all
provider ESIs
OK
PBB 802.1ah PB 802.1ad
CVLAN ESI
C-ESI
SVLAN ESI
S-ESI I-ESI
BEB
I-tag
B-ESI
BCB
B-tag