Vid Mac Filters - Alcatel-Lucent 7450 Configuration Manual

Filter Policy Advanced Topics
ISID match criterion can be applied to the same interconnect endpoint(s), BVPLS SAP or PW, as
the mrp-policy to restrict the egress transmission any type of frames that contain a local ISID. The
ISID filters will be applied as required on a per B-SAP or B-PW basis just in the egress direction.
The ISID match criteria are exclusive with any other criteria under mac-filter. A new mac-filter
type attribute is defined to control the use of ISID match criteria and must be set to ISID to allow
the use of ISID match criteria.

VID MAC filters

VID Filters are a type of MAC filters that extend the capability of current Ethernet Ports with null
or default SAP tag configuration to match and take action on VID tags. Service delimiting tags (for
example QinQ 1/1/1:10.20 or dot1q 1/1/1:10, where outer tag 10 and inner tags 20 are service
delimiting) allow fine grain control of frame operations based on the VID tag. Service delimiting
tags are exact match and are stripped from the frame as illustrated in
service delimiting Tags do not require VID filters. VID filters can only be used to match on frame
tags that are after the service delimiting tags.
With VID Filters operators can choose to match VID tags for up to two tags on ingress or egress or
both.
•
•
VID Filters add the capability to perform VID value filter policies on default tags (1/1/1:* or 1/1/
1:x.*, or 1/1/1/:*.0), or null tags ( 1/1/1, 1/1/1:0 or 1/1/1:x.0). The matching is based on the port
configuration and the SAP configuration.
In the industry the QinQ tags are often referred to as the C-VID (Customer VID) and S-VID
(service VID). The terms outer tag and inner tag allow flexibility without having to refer to C-TAG
and an S-TAG explicitly. The position of inner and outer tags is relative to the port configuration
and SAP configuration. Matching of tags is allowed for up to the first two tags on a frame. Since
service delimiting tags may be 0, 1 or 2 tags.
The meaning of inner and outer has been designed to be consistent for egress and ingress when the
number of non service delimiting tags is consistent. Service 1 in
from qinq to a single dot1q example where there is one non-service delimiting tag on ingress and
egress. Service 2 shows a symmetric example with two non-service delimiting tags (plus and
additional tag for illustration) to two non-service delimiting tags on egress. Service 3 illustrates
single non-service delimiting tags on ingress and to two tags with one non-service delimiting tag
on ingress and egress.
Page 454
The outer-tag is the first tag in the packet that is carried transparently through the service.
The inner-tag is the second tag in the packet that is carried transparently through the
service.
Figure 17
7450 ESS Router Configuration Guide
Figure 17. Exact match or
shows a conversion