LAG
Page 38 7210 SAS M, T, X, R6, R12, Mxp Interface Configu-
ration Guide
100Mbps, for a SAP configured on a LAG with two ports, then the policer limits the traffic
entering the system through the two ports to a maximum of 100Mbps.
In 7210 SAS-X, SAP egress QoS policy shaper parameters are applied to all the ports that are
members of the LAG (all ports get the full SLA). For example, if an SAP egress policy is
configured with a shaper of PIR 100Mbps, each port would get a PIR of 100 Mbps. The advantage
of this method over a scheme where the PIR is divided equally among all the member ports of the
LAG is that, a single flow can uses the entire SLA. The disadvantage is that the overall SLA can
be exceeded if the flows span multiple ports.
In 7210 SAS-X, network port egress QoS policy shaper parameters are applied to all the ports that
are members of the LAG (all ports get the full SLA). For example, if an network port egress policy
is configured with a shaper of PIR 100Mbps, each port would get a PIR of 100 Mbps. The
advantage of this method over a scheme where the PIR is divided equally among all the member
ports of the LAG is that, a single flow can uses the entire SLA. The disadvantage is that the overall
SLA can be exceeded if the flows span multiple ports.
LAG and QoS policies on 7210 SAS-R6 and 7210 SAS-R12
In 7210 SAS-R6 and 7210 SAS-R12, a SAP ingress QoS policy or network port ingress QoS
policy or network IP interface ingress QoS policy is applied to the aggregate traffic that enters
through all the ports on a IMM. If the LAG has member ports on different IMMs, then the policy is
created for each IMM and is applied to the aggregate traffic that enters through all the ports on a
given IMM. For example, if an ingress policy is configured with a policier of PIR 100Mbps, for a
SAP configured on a LAG with two ports, then the policer limits the traffic entering through the
two ports of the IMM to a maximum of 100Mbps. If the LAG has two ports on 2 different IMMs,
then policy is applied each IMM individually, and the policer on each IMM allows a maximum of
100Mbps for a total of 200Mbps.
In 7210 SAS-R6 and 7210 SAS-R12, SAP egress QoS policy shaper parameters are applied to all
the ports that are members of the LAG (all ports get the full SLA), irrespective of whether they are
located on a single IMM or two different IMMs. For example, if an SAP egress policy is
configured with a shaper of PIR 100Mbps, each port would get a PIR of 100Mbps. The advantage
of this method over a scheme where the PIR is divided equally among all the member ports of the
LAG is that, a single flow can uses the entire SLA. The disadvantage is that the overall SLA can
be exceeded if the flows span multiple ports.
In 7210 SAS-R6 and 7210 SAS-R12, network port egress QoS policy shaper parameters are
applied to all the ports that are members of the LAG (all ports get the full SLA), irrespective of
whether they are located on a single IMM or two different IMMs.. For example, if an network port
egress policy is configured with a shaper of PIR 100Mbps, each port would get a PIR of 100
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