Using Map Groups
Configuring QoS
page 21-44
OmniSwitch 6624/6648 Network Configuration Guide
April 2004
How Map Groups Work
When mapping from 802.1p to 802.1p, the action will result in remapping the specified values. Any values
that are not specified in the map group are preserved. In this example, a map group is created for 802.1p
bits.
-> policy map group Group2 1-2:5 4:5 5-6:7
-> policy action Map1 map 802.1p to 802.1p using Group2
The
to
and
from
values are separated by a colon (
:
). If traffic with 802.1p bits comes into the switch and
matches a policy that specifies the
Map1
action, the bits will be remapped according to
Group2
. If the
incoming 802.1p value is 1 or 2, the value will be mapped to 5. If the incoming 802.1p value is 3, the
outgoing value will be 3 (the map group does not specify any mapping for a value of 3). If the incoming
802.1p value is 4, the value will be mapped to 5. If the incoming 802.1p value is 5 or 6, the value will be
mapped to 7.
When mapping to a different type of value, however (ToS/DSCP to 802.1p), any values in the incoming
flow that matches the rule but that are not included in the map group will be zeroed out. For example, the
following action specifies the same map group but instead specifies mapping 802.1p to ToS:
-> policy action Map2 map tos to 802.1p using Group2
In this case, if ToS traffic comes into the switch and matches a policy that specifies the
Map2
action, the
ToS value will be mapped according to
Group2
if the value is specified in
Group2
. If the incoming ToS
value is 2, the value will be mapped to 5; however, if the incoming value is 3, the switch will map the
value to zero because there is no mapping in
Group2
for a value of 3.
Note.
Ports on which the flow is mapped must be a trusted port; otherwise the flow will be dropped.
Creating Map Groups
To create a map group, use the
policy action map
command. For example, to create a map group called
tosGroup
, enter:
-> policy map group tosGroup 1-2:5 4:5 5-6:7
The to and from values are separated by a colon (
:
). For example, a value of 2 will be mapped to 5.
Note.
Map group configuration is not active until the
qos apply
command is entered.
The remapping group may then be associated with a rule through the
policy action
command. In this
example, a policy condition called
Traffic
has already been configured.
-> policy action tosMap map tos to 802.1p using tosGroup
-> policy rule r3 condition Traffic action tosMap
To delete mapping values from a group, use
no
and the relevant values:
-> policy map group tosGroup no 1-2:4
The specified values will be deleted from the map group at the next
qos apply
.
Содержание OmniSwitch 6624
Страница 1: ...Part No 060179 10 Rev C April 2004 OmniSwitch 6624 6648 Network Configuration Guide www alcatel com...
Страница 22: ...Contents xxii OmniSwitch 6624 6648 Network Configuration Guide April 2004...
Страница 174: ...Verifying 802 1Q Configuration Configuring 802 1Q page 9 12 OmniSwitch 6624 6648 Network Configuration Guide April 2004...
Страница 264: ...Verifying the RIP Configuration Configuring RIP page 13 16 OmniSwitch 6624 6648 Network Configuration Guide April 2004...
Страница 276: ...Verifying the RDP Configuration Configuring RDP page 14 12 OmniSwitch 6624 6648 Network Configuration Guide April 2004...
