Cisco OL-21636-01 - Manual (Page 49)

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Cisco IP Solution Center L2VPN and Carrier Ethernet User Guide, 6.0
OL-21636-01
Chapter 3 Creating a FlexUNI/EVC Ethernet Policy
Setting the FlexUNI Attributes
• This attribute is available regardless of the number of tags used in the match criteria. Whether the
incoming traffic is double tagged or single tagged, if Push Outer is enabled, all corresponding
service requests push an outer tag. All subsequent nodes consider only the outer-most two tags (if
FlexUNI-capable) or just one tag (not FlexUNI-capable) and treat the inner-most tags transparently
as payload.
• This VLAN ID is not derived from ISC-managed VLAN ID pools.
Step 4 Check the Push Inner check box to impose an inner VLAN ID tag onto the incoming frames that fulfill
the match criteria.
This operation pushes both an inner and an outer tag onto the incoming packet, not just an inner tag. If
this check box is unchecked, no inner tag is imposed on the incoming frames.
Usage notes:
• If Push Inner is checked, all service requests created with the policy push a dot1q inner tag on the
incoming frames matching the match criteria. When creating the link during service creation, the
operator can specify an inner tag with a value from 1 to 4096.
• If Push Inner is checked, Push Outer is automatically checked.
• This attribute is available regardless of the number of tags used in the match criteria. Regardless of
whether the incoming traffic is double tagged or single tagged, if Push Inner is enabled, all
corresponding service requests push an inner tag. All subsequent nodes consider only the outer-most
two tags (if FlexUNI-capable) or just one tag (not FlexUNI-capable) and treat the inner-most tags
transparently as payload.
• This VLAN ID is not derived from ISC-managed VLAN ID pools.
Step 5 Check the Translate Outer check box to allow the operator to specify a target outer VLAN ID during
service request creation.
The outer tag of all the incoming frames that fulfill the match criteria are translated to this ID. If the
check box is unchecked, no outer tag translation is performed. See
Table 3-1 .
Step 6 Check the Translate Inner check box to allow the operator to specify a target inner VLAN ID during
service request creation.
The inner tag of all the incoming frames that fulfill the match criteria are translated to this ID. If the
check box is unchecked, no inner tag translation is performed. See
Table 3-1 .
Note Table 3-1 summarizes the realization of different VLAN translations available in the FlexUNI/EVC
infrastructure. The second and third columns (Match Outer Tag and Match Inner Tag) refer to policy
settings. The last two columns (Translate Outer Tag and Translate Inner Tag) indicate the VLAN
translation that occurs on the incoming frames.
Step 7 Click Next.
Table 3-1 VLAN Translation Summary Table
Type Match Outer Tag Match Inner Tag Translate Outer Tag Translate Inner Tag
1:1 True N/A Yes No
1:2 True N/A Yes Yes
2:1 True True Yes No
2:2 True True Yes Yes