Cisco 7600 Series Często zadawane pytania - Strona 3
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• 1-port Channelized OC-12/STM-4 POS to DS0 (SM-IR) with 4-ports Gigabit Ethernet
• 12-port Channelized T3 to DS0
Q. What is an Enhanced OSMs supported on the Cisco 7600 Series?
A. The Enhanced OSMs represent a complete family of optical-speed network interfaces, including POS, DPT, ATM,
and Channelized interfaces, which constitute the next generation of optical-service modules for the Cisco 7600 Series.
The Enhanced OSMs offer all the benefits of the original OSMs with the following incremental benefits:
• Increased MPLS/VPN Virtual Route Forwarding (VRF) support to a minimum of 511 and up to 1023 per system
for MPLS Layer 3 configurations.
• Enhancement to existing QoS features with the addition of support for WRED.
• Support for a greater number of traffic-shaping queues, with deeper queue buffers. The Enhanced OSMs support
a minimum of 8000 QoS queues per PXF network processor.
• Future support for Layer 2 AToM network-aggregation features to support traditional Layer 2 services such as
Frame Relay and ATM over an MPLS core network with simultaneous support for Layer 3 services using RFC
2547-compliant MPLS VPNs.
Q. What is a Channelized OSM for the Cisco 7600 Series?
A. The Channelized OSMs give service providers and large enterprises a mechanism to consolidate high-speed leased
lines onto a single optical or copper link. These OSMs enable users to channelize an OC-12/STM-4 circuit down to
DS3 or DS0, depending on the OSM. In addition, a Channelized T3 OSM provides copper T3 channelization down
to DS0. Cisco offers three options for high-speed channelized optical connectivity for the Cisco 7600 Series:
Channelized OC-12/STM-4 to DS3, Channelized OC-12/STM-4 to DS0, and Channelized T3 to DS0.
Q. Which port adapters are currently supported by the Cisco 7600 Series FlexWAN Module?
A. The following port adapters can be used with the Cisco 7600 Series FlexWAN Module:
T1/E1: PA-4T+, PA-8T-V35, PA-8T-232, PA-8T-X21, PA-MC-4T1, PA-MC-8T1, PA-MC-8E1/120
T3/E3 and STM-1: PA-T3, PA-T3+, PA-E3, PA-2T3, PA-2T3+, PA-2E3, PA-MC-T3, PA-MC-E3, PA-MC-2T3+,
PA-MC-STM-1
HSSI: PA-H, PA-2H
ATM: PA-A3-T3, PA-A3-E3, PA-A3-OC3MM, PA-A3-OC3SMI, PA-A3-OC3SML, PA-A3-8E1IMA,
PA-A3-8T1IMA
Packet over SONET: PA-POS-OC3MM, PA-POS-OC3SMI, PA-POS-OC3SML
Q. What is PXF on the OSM for the Cisco 7600 Series?
A. PXF stands for Parallel eXpress Forwarding and is the term used to describe the adaptive network processors
used on each OSM (up to two per line card). These processors provide IP service application at up to 6 Mpps.
Q. Which features are accelerated through hardware on the Cisco 7600 Series?
A. The Cisco 7600 Series supports a wide array of features in one of two acceleration paths. The first path is in the
Policy Feature Card (PFC) complex. The PFC supports IPv4 Unicast and Multicast traffic along with features such
as policing, marking, classification, and access control lists (ACLs) at 30 Mpps.
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