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Overview
SAP Ingress Policy Defaults
Table 37: SAP Ingress Policy Defaults
description
scope
num-qos-classifiers
meter
mode
adaptation-rule
rate
cbs
mbs
default-fc
SAP Ingress queues on 7210 SAS-X
NOTE: On 7210 SAS-X, Per SAP ingress multicast queues are not supported for any service.
Currently, 7210 SAS-X supports use of policers/meters for enforcing SLAs on SAP ingress.
Received traffic is metered and queued up on egress uplink, contending for buffer resources and
bandwidth with all other traffic using the same egress uplink. It is known that policing has
detrimental effect on TCP traffic as policing drops packets exceeding the configured rate
potentially causing TCP retransmissions and reducing the link utilization due to reduced window
sizes. SAP ingress queuing for unicast traffic allows users to enforce SLAs on SAP ingress
without the negative effects of policing on TCP traffic. With use of ingress SLAs, users have better
control of the traffic accepted by the network.
User is provided with an option to use a queue or a policer/meter per FC on SAP ingress. A queue
is available for use only with unicast traffic. Broadcast, Unknown Unicast, and Multicast traffic
(BUM traffic) can only use a policer/meter and share per FC per node ingress multicast queues.
User needs to enable ingress queuing using the CLI command configure> system> resource-
profile> qos> ingress-queues. Ingress queuing is disabled by default. After using this CLI
command the node needs to be rebooted for the change to take effect. All services, viz. VLL,
VPLS, VPRN, PBB I-VPLS, PBB B-VPLS supports per SAP ingress queuing and shaping
A maximum of up to 8 unicast queues can be associated with SAP ingress. User is allowed to use
a mix of FCs per SAP such that some FCs uses queues and some uses meters. A FC needs to be
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7210 SAS-X and 7210 SAS-R6 OS Quality of Service Guide
Field
Default
"Default SAP ingress QoS policy."
template
2
1
trtcm
cir closest pir closest
pir = max, cir= 0
Default
Default
be
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