QoS and QoS Policies
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Quality of Service Guide
3HE 11014 AAAC TQZZA Edition: 01
3.2.7 Fabric Shaping on the Fixed Platforms (Access and
Network)
The 7705 SAR-A, 7705 SAR-Ax, 7705 SAR-M, 7705 SAR-H, 7705 SAR-Hc,
7705 SAR-W, and 7705 SAR-Wx support user-configurable fabric shapers at rates
of up to 5 Gb/s for access ingress and network ingress traffic. The fabric interface on
these nodes is a shared resource between both traffic types, and one buffer pool
serves all MDAs (ports).
These nodes do not support fabric profiles; instead, they have a single aggregate
rate limit for restricting access traffic into the fabric and a single aggregate rate limit
for restricting network traffic into the fabric. These limits apply to all MDAs. Both
access ingress and network ingress traffic can be configured to shaping rates of
between 1 kb/s and 5 Gb/s. The default rate for access ingress traffic is 500 Mb/s.
The default rate for network ingress traffic is 2 Gb/s. Statistics can be viewed for
aggregate access and network traffic flow through the fabric and possible discards.
The 7705 SAR-X fabric shaper rate is not configurable for access ingress or network
ingress traffic, and is set to the maximum rate for the platform. There are three buffer
pools on the 7705 SAR-X, one for each MDA (block of ports).
Note:
• Gen-2 and Gen-3 adapter cards only support aggregate mode fabric shapers for
access ingress traffic, regardless of the service types configured.
• If multipoint services such as IES, VPRN, and VPLS are running on an adapter card,
only aggregate mode fabric profile can be configured for the card at access ingress.
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