7705 SAR Interfaces
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Interface Configuration Guide
3HE 11011 AAAC TQZZA Edition: 01
The DS3/E3 clear channel access ports on the 4-port DS3/E3 Adapter card can be
configured for ATM PW services (categories CBR, VBR-rt, VBR-nrt, UBR, and
UBR+MCR), for TDM PW services to transport 2G traffic from BTSs, and for frame
relay PW service.
Access ports on the 2-port OC3/STM1 Channelized Adapter card can be configured
for TDM to transport 2G traffic from BTSs or ATM/IMA to transport 3G UMTS traffic
from Node Bs. Access ports on the 4-port OC3/STM1 / 1-port OC12/STM4 Adapter
card can only be configured for TDM.
All member links of the IMA group must reside on the same card. The 2G traffic is
transported across the PSN encapsulated in a TDM VLL. The 3G traffic is
transported using ATM VLLs.
For PPP/MLPPP channel groups, the encapsulation type must be ipcp. For Ethernet
VLLs, the encapsulation type can be null, dot1q, or qinq. For TDM VLLs, the
encapsulation type must be cem. For ATM VLLs, the encapsulation type must be
atm.
H-QoS for Access Egress Ethernet Ports
To support hierarchical QoS (H-QoS) on second-generation Ethernet adapter cards,
the 7705 SAR supports the configuration of one aggregate CIR rate for all the
unshaped 4-priority access egress Ethernet SAPs on a port, thereby ensuring that
all the unshaped SAPs can compete with the shaped SAPs on the port for fabric
bandwidth. Use the config>port>ethernet>access>egress>unshaped-sap-cir
command to set the aggregate CIR rate.
Third-generation (Gen-3) Ethernet adapter cards and platforms have 4-priority
schedulers, and all SAPs are shaped SAPs. See Table 2 for a list of first-, second-,
and third-generation adapter cards, modules, and platforms. Refer to the “QoS for
Gen-3 Adapter Cards and Platforms” section in the 7705 SAR Quality of Service
Guide for more information on 4-priority schedulers for Gen-3 hardware.
Ports on the 4-port SAR-H Fast Ethernet module do not support H-QoS.
For more information on H-QoS and on shaped and unshaped Ethernet SAPs, refer
to the “Per-SAP Aggregate Shapers (H-QoS)” section in the 7705 SAR Quality of
Service Guide.
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