ethernet filtering
To enable ethernet filtering on interfaces on the router, use the ethernet filtering command in the interface
configuration mode. To disable ethernet filtering, use the no form of the command.
ethernet filtering {dot1ad| dot1q}
no ethernet filtering
Syntax Description
Filters only the Ethernet multicast protocol addresses that are reserved by IEEE 802.1ad,
used for C-facing interfaces, to prevent C-network traffic from interfering with the
S-network protocols.
dot1ad
Filters all Ethernet multicast protocol addresses.dot1q
Command Default
Ethernet filtering is not enabled.
Command Modes
interface configuration mode
Command History
ModificationRelease
This command was introduced.Release 3.9.0
Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
The following table lists the DA MAC addresses and specifies the action taken when either the dot1q or the
dot1ad keywords are used:
dot1addot1qDescriptionDA MAC Address
DataDiscardSTP, RSTP, MSTP, etc.01-80-C2-00-00-00
DiscardDiscard802.3X Pause Protocol01-80-C2-00-00-01
DiscardDiscardSlow Protocols: 802.3ad
LACP, 802.3ah OAM
01-80-C2-00-00-02
DiscardDiscard802.1X01-80-C2-00-00-03
DiscardDiscardReserved01-80-C2-00-00-04
Cisco ASR 9000 Series Aggregation Services Router VPN and Ethernet Services Command Reference, Release
6.1.x
16
Ethernet Interfaces Commands
ethernet filtering
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