CVID egress filtering permits the egress from VMAN to CEP of only those frames that contain a CVID that has been mapped to the source VMAN; all other frames are blocked. For example, Customer Edge Port A in CVID Egress Filtering is configured to support CVIDs 10-29, and Customer Edge Port B is configured to support CVIDs 10-19. If CVID egress filtering is enabled on Customer Edge Port B, frames with CVIDs 20-29 will not be forwarded at the egress of Customer Edge Port B.
You can enable CVID egress filtering for a single CEP or for all CEPs with a CLI command. You can also repeat the command to enable this feature on multiple CEPs.
Note
CVID egress filtering is available only on the platforms listed for this feature in the Switch Engine 32.3 Feature License Requirements document.When this feature is enabled, it reduces the maximum number of CVIDs that can be mapped to VMANs. The control of CVID egress filtering applies to fast-path forwarding. When frames are forwarded through software, CVID egress filtering is always enabled.