QoS and QoS Policies
44
Quality of Service Guide
3HE 11014 AAAC TQZZA Edition: 01
3.1.8.3 VLAN Shaper Applications
This section describes the following two scenarios:
• VLAN Shapers for Dual Uplinks
• VLAN Shapers for Aggregation Site
3.1.8.3.1 VLAN Shapers for Dual Uplinks
One of the main uses of per-VLAN network egress shapers is to enable load
balancing across dual uplinks out of a spoke site. Figure 6 represents a typical
hub-and-spoke mobile backhaul topology. To ensure high availability through the
use of redundancy, a mobile operator invests in dual 7750 SR nodes at the MTSO.
Dual 7750 SR nodes at the MTSO offer equipment protection, as well as protection
against backhaul link failures.
Note:
• Per-VLAN network egress shapers are not supported on:
− Fast Ethernet ports (including ports 9 to 12 on the 7705 SAR-A)
− Gigabit Ethernet ports in Fast Ethernet mode
− non-datapath Ethernet ports (for example, the Management port)
− GPON, xDSL, and SHDSL module slots
− DSL ports on the 7705 SAR-Wx
• For the 8-port Ethernet Adapter card, version 2, the following rules apply:
− To configure per-VLAN shapers, the profile scheduler mode must be in use (that
is, rate-based scheduling).
− Per-VLAN shapers are only supported on Gigabit Ethernet ports (not on Fast
Ethernet ports).
− Setting egress-rate and using per-VLAN shapers are mutually exclusive. If
egress-rate is configured, then per-VLAN shapers cannot be configured. If one
or more per-VLAN shapers are configured, then egress-rate cannot be enabled.
− A maximum of eight per-VLAN shapers can be configured on an 8-port Ethernet
Adapter card, version 2.
− On an 8-port Ethernet Adapter card, version 2, installed in an 7705 SAR-18, when
a Fast Ethernet port is configured as a network port with profile scheduler mode,
the number of per-VLAN shapers supported on the card is reduced by one.
To Next Page
Loading...
