Enable QoS on Cisco 857

Unanswered Question
Jun 29th, 2010


I would like to enable QoS on a Cisco 857 router so I can give priority to VOIP traffic. I have not done this before, so wondered whether someone could point me in the direction of a good guide on this can be achieved.

I have also read in different places that QoS cannot be fully implemented on the Cisco 857 - can anyone tell me if this is true?



I have this problem too.
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spremkumar Tue, 06/29/2010 - 05:20


Check this link for the info on QoS configuration.


As you read Cisco 857 doesnt support full QoS implementation when compared to the higher models even in 800 series.

QoS features supported by Cisco 850 series routers

Quality of Service (QoS) Features

• Weighted Fair Queuing (WFQ)
• Policy-based routing (PBR)
• Per-VC queuing
• Per-VC traffic shaping

QoS features supported by Cisco 870 series router

QoS Features

• Weighted Fair Queuing (WFQ)
• Class-Based WFQ (CBWFQ)
• Low-Latency Queuing (LLQ)
• Class-Based Traffic Shaping (CBTS) (Cisco 871 only)
• Class-Based Traffic Policing (CBTP) (Cisco 876, 877, and 878 only)
• Class-Based QoS MIB
• Prefragment before encryption
• TX ring adjustment
• VC bundling
• Policy-based routing (PBR)
• Per-VC queuing
• Per-VC traffic shaping





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