Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 479)

Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide 455
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Configuring VPLS instances
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Syntax: vpls name / vpls-vcid [cos cos-value] [max-mac max-mac-entries]
The name variable is the name of the VPLS instance for which the user is configuring the maximum
number of MAC entries.
The vpls-vcid variable is the VPLS ID number of the VPLS instance for which the user is configuring
the maximum number of MAC entries. The vpls-vcid variable can take a value in the range of one
through 4294967294.
The user can optionally specify a Class of Service (CoS) setting for the VPLS instance. When a CoS
value is set, the device selects a tunnel LSP that also has this CoS value, when one is available.
When no tunnel LSP with this CoS value is available, the device selects a tunnel LSP with the
highest configured CoS value (although never higher than the CoS setting for the VPLS instance).
The CoS value has a range from zero through seven.
The max-mac-entries variable specifies the maximum number of MAC entries that can be learned
for the VPLS instance. The max-mac-entries value can range from one to global VPLS MAC
database size.
Specifying the maximum size of the VPLS MAC database
The VPLS MAC database serves as a Layer 2 forwarding table that associates local MAC addresses
with CE devices and remote MAC addresses with VC LSPs used to reach the remote CE devices. By
default, the VPLS MAC database can contain a total of 2048 entries on a Brocade MLX series
device and 8192 entries on a Brocade NetIron XMR device. This number represents the total
number of MAC addresses that can be learned for all VPLS instances configured on the device.
The user can globally specify a different maximum size for the VPLS MAC database by entering a
command such as the following.
Brocade(config)# system-max vpls-mac 4096
Syntax: system-max vpls-mac number-of-entries
NOTE
The user must reload the system for the system-max vpls-mac command to take effect.
VPLS LDP MAC Address Withdrawal
For faster VPLS convergence, the user can remove or unlearn the MAC addresses that are learned
dynamically. The Label Distribution Protocol (LDP) Address Withdrawal message is sent with the list
of MAC addresses, which need to be withdrawn to all other PEs that are participating in the
corresponding VPLS service.
The MAC address withdrawal feature is added through the LDP Address Withdrawal message. To
enable the MAC address withdrawal feature, use the mac-address withdrawal command. By
default, MAC address withdrawal is disabled.
Configuration considerations:
• This configuration is not applicable for PBB enabled VPLS Instances.