Questions tagged [cos]

For questions about Class of Service, a layer-2 QoS mechanism used with VLAN tags.

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3
votes
1answer
54 views

STP packets and QoS

Routing protocol packets are IP packets and therfore they could have different DSCP values to have different priorities (which is implemented by QoS policy) during congestion. How about non-IP packets?...
1
vote
1answer
53 views

QoS - Add DSCP EF tag with L2 switches?

Here is the topology that I have: Phone => (access port) L2 Switch (trunk) => Router My goal here is to add an EF tag to the packets coming from my phones. Basically, if a packet comes in being in ...
1
vote
1answer
27 views

QoS Classification and Drop Rate

Sorry if i sound completely senseless, In CBWFQ, q1) Does WRED only make sense if there is more than 1 dscp marking in a queue ? q2) if traffic_typeA is to be handle with higher priority then ...
2
votes
1answer
150 views

Match cos is not supported for this interface in the output direction

I Have ROUTER CISCO ASR 903 ( IOS XE V3.18 ) ip access-list extended ip-google-traffic permit ip 8.8.4.0 0.0.0.255 any permit ip 8.8.8.0 0.0.0.255 any permit ip 8.34.208.0 0.0.15.255 any permit ...
2
votes
1answer
110 views

How do you schedule traffic that exits via a bridge-domain?

I've got a single MX router connected to two physical interfaces on an SRX chassis cluster - each interface being a member of a reth interface. In order to make this work, on the MX side I have the ...
3
votes
1answer
112 views

Bandwidth hogging on managed switched network 17 users

Lately we have been getting bandwidth hogging when any user attempts to download updates / youtube / anything large files. The rest of the network is clogged. We have a fibre 20meg line in. 20meg ...
1
vote
1answer
921 views

QoS (802.1p) for iSCSI Traffic on Cisco Nexus 3048

We're building a new core for our University and one thing that bugs me is the iSCSI network. We already considered Jumbo Frames and Flow Control on the iSCSI ports, but one thing remains for debate, ...
5
votes
1answer
994 views

Juniper destination based CoS

I'm trying to do destination based CoS on Juniper MX basing on destination ASN. I've tried config below. set policy-options as-path BGP-PATH-TO-MARK-COS "65512 .* set policy-options policy-statement ...
8
votes
2answers
2k views

Is the shaping-rate on a CoS scheduler per-port or aggregate on a Juniper EX?

I'm using a Juniper EX2200 as demarc/CPE device for a customer that has multiple handoff ports on the one switch. I need to make sure that, across all their ports, they don't use more bandwidth than ...
8
votes
2answers
123 views

TDMoE and QoS considerations

As mentioned in the previous question I am looking at sending voice communications over a Metro Ethernet connection shared also by data connections. In addition to the previous question I have this ...
6
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2answers
6k views

QoS on HP Procurve 2520 and 3800 switches

Do Procurve switches remark cos/dscp values between switches (trust boundaries) as Cisco switches do? I'm wondering if there is an equivalent to "mls qos trust (cos/dscp)" in the HP realm.
28
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5answers
22k views

Are CoS and QoS ever interchangeable?

The terms CoS & QoS are often used interchangably, particularly in the SP space when providing "Class of Service profiles" etc as part of Product sets. I'm looking to re-affirm my understanding ...