H3C Technologies H3C S6800 Series Switches - Manual (Page 389)

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An AC is a service instance on a Layer 2 Ethernet interface or Layer 2 aggregate interface. The AC
forwards packets that are received on the interface and meet the match criteria of the service instance to
the bound VSI.
On a PE, configure a service instance on the Layer 2 Ethernet interface or Layer 2 aggregate interface
that connects to a CE to match packets for the AC.
To configure a service instance:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter Layer 2 Ethernet
interface view or Layer 2
aggregate interface view.
• Enter Layer 2 Ethernet interface view:
interface interface-type
interface-number
• Enter Layer 2 aggregate interface
view:
interface bridge-aggregation
interface-number
N/A
3. Create a service instance
and enter service instance
view.
service-instance instance-id
By default, no service
instance is created.
4. Configure match criteria for
the service instance.
• Match all incoming packets:
encapsulation default
• Match incoming packets with any
VLAN ID or no VLAN ID:
encapsulation { tagged | untagged }
• Match incoming packets with a
specific outer VLAN ID:
encapsulation s-vid vlan-id
[ only-tagged ]
By default, no match criteria
are configured for the service
instance.
To match packets with VLAN
IDs on an interface, you must
first create the VLANs, and
then assign the interface to
the VLANs.
Configuring a VSI
Step Command Remarks
1. Enter system view. system-view N/A
2. Create a VSI and enter VSI
view.
vsi vsi-name By default, no VSI is created.
3. (Optional.) Configure a
description for the VSI.
description text
By default, no description is
configured for a VSI.
4. (Optional.) Set the default PW
ID for the VSI.
default-pw-id default-pw-id
By default, no default PW ID is
configured for the VSI.
5. Set an MTU for the VSI. mtu mtu
By default, the MTU of a VSI is
1500 bytes.
6. (Optional.) Enable the VSI. undo shutdown By default, a VSI is enabled.