•
The burst size can be set to a wide range of sizes up to 2000 ms. However, for satellite ports, the actual
burst size when queuing (shaping) is used is always set to 500 usec of 1Gbits or less. This is because of
constraints in the hardware.
Auto QoS
Traffic from the satellite system to the Cisco IOS XR ASR9000 series router and traffic from the ASR9000
series router to the satellite system have been discussed.
Satellite to ASR9000 series router
•
Traffic is handled using the trusted port model.
•
Automatic packet classification rules determine whether a packet is control packet (LACP, STP, CDP,
CFM, ARP, OSPF etc), high priority data (VLAN COS 5,6,7, IP prec 5, 6, 7) or normal priority data
and queued accordingly.
•
Protocol types auto-prioritized by the satellite - all IEEE control protocols (01 80 C2 xx xx xx), LACP,
802.3ah, CFM, STP, CDP, LLDP, ARP, OSPF,, RIP, BGP, IGMP, RSVP, HSRP, VRRP p2 q.
•
User data packets auto-prioritized by the satellite - VLAN COS 5, 6, 7, IP precedence 5, 6, 7 MPLS
EXP 5, 6, 7.
Figure 14: AutoQoS, satellite to host
ASR9000 series router to satellite
•
Traffic targeted to a satellite egress port is shaped on ASR9K to match downstream access port speed.
•
Traffic is streamed based on the full 3-level egress queuing hierarchy.
Cisco ASR 9000 Series Aggregation Services Router nV System Configuration Guide, Release 5.3.x
76
Configuring QoS on the Satellite System
Auto QoS
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