Restrictions for Per Session Queueing and Shaping for PPPoEoVLAN Using RADIUS
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Each PPPoE over VLAN session for which per session queueing and shaping is configured has its own set of queues and its own VTMS link. Therefore, these PPPoE sessions do not inherit policies unless you remove the service policy applied to the session or you do not configure a policy for the session.
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The router supports per session queueing and shaping on PPPoE terminated sessions and on an IEEE 802.1Q VLAN tagged subinterfaces for outbound traffic only.
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The router does not support per session queueing and shaping for PPPoE over VLAN sessions using RADIUS on inbound interfaces.
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The router does not support per session queueing and shaping for layer 2 access concentrator (LAC) sessions.
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The statistics related to quality of service (QoS) that are available using the show policy-map interface command are not available using RADIUS.
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The router does not support using a virtual template interface to apply a service policy to a session.
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You can apply per session queueing and shaping policies only as output service policies. The router supports input service policies on sessions for other existing features, but not for per session queueing and shaping for PPPoE over VLAN using RADIUS.
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During periods of congestion, the router does not provide specific scheduling between the various PPPoE sessions. If the entire port becomes congested, the scheduling that results has the following effects: - The amount of bandwidth that each session receives of the entire port’s capacity is not typically proportionally fair share.
- The contribution of each class queue to the session’s total bandwidth might not degrade proportionally.
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The PRE2 does not support ATM overhead accounting for egress packets with Ethernet encapsulations. Therefore, the router does not consider ATM overhead calculations when determining that the shaping rate conforms to contracted subscriber rates.
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The router does not support the configuration of the policy map using RADIUS. You must use the MQC to configure the policy map on the router.