Cisco Cisco IOS Software Release 12.2(27)SBC

To assign an encapsulation sequence number to a priority class in a multiclass multilink PPP bundle, use 
the encap-sequence command in policy-map class configuration mode. To reset the default value, use 
the no form of this command.

encap-sequence [sequence-id | none] 

no encap-sequence sequence-id

Sequence numbers are not assigned to priority classes. 

Policy-map class configuration

The encap-sequence command allows you to assign sequence numbers to priority classes in a policy 
map for multiclass multilink PPP encapsulation. This command is only supported on the PRE2. 

A class with a multiclass multilink PPP sequence number must have an associated queue action such as 
bandwidth and shape. The sequence number assigned to each priority class must be unique. 

The default sequence number for class-default is 0 and it is not configurable. 

If you do not assign a sequence number to a priority class, the priority queue packets use 
PPP encapsulation. Interleaving is allowed for priority traffic regardless of the encapsulated sequence 
number configuration. 

The following example shows that class voice has the highest priority and that packets are not 
encapsulated with a sequence number for multiclass multilink PPP. 

Router(config)# policy-map prec1

Router(config-pmap)# class voice

Router(config-pmap-c)# priority 

Router(config-pmap-c)# police 128

Router(config-pmap-c)# encap-sequence none

Router(config-pmap-c)# exit

Router(config-pmap)# class video

Assigns a unique encapsulation sequence number to priority class in a 
multiclass multilink PPP bundle. Valid range is from 0 to 3.

Specifies that a certain priority class is classified as or is assigned the highest 
priority, and packets are not encapsulated with a sequence number for 
multiclass multilink PPP. 

12.2(31)SB2

This command was introduced and implemented on the Cisco 10000 series 
router for the PRE2.