Cisco Switching/Routing :: 6500 - Hardware QOS Trust?
May 8, 2012
I have a question which i am unsure of, on the 6500 i know i can set mls qos trust to cos or dscp since I don't have any trunks configured on that switch that i want to trust cos most of my ports trust dscp instead. The question is will packets coming in or going out at L3 with the TOS bits set get placed in the correct in/out queue. For example if a packet comes in on a port with a mls qos trust dscp and has the TOS set to XX will this XX get mapped to the correct COS value based on the default dscp to cos map and end up going out the correct queue which handles that specific COS number?
I mainly asked this because i saw the following on the cisco site and again i am suing dscp trust and not cos.
Weighted Round Robin (WRR), Deficit Weighted Round Robin (DWRR) and Shaped Round Robin (SRR). WRED and all the Round Robin scheduling options use the priority tag (CoS) inside an Ethernet frame to provide enhanced buffer management and outbound scheduling.
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Jul 4, 2012
I am reading through a QOS Document and they want me to trust the DSCP value from an IP phone (Siemens) but UN trust the PC DSCP value. How can I trust one thing but not the other? I am using a 2960 Cisco switch with IP base IOS.
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Jan 8, 2013
i have Catalyst2950SI with iOS12.1, connect a wifi-access-point to f1/1(dot1q trunk port),and connect another L2SW to f1/2(dot1q trunk port),and IP phone, MobileCamera connects to wifi-access-point,IP phone has dscp=40 value on its own packet,but MobileCamera doesn't have any dscp value or cos.now, i wanna do QoS by that dscp, So i type as below,
interface 1/1
switchport mode trunk
mls qos trust dscp
interface 1/2
switchport mode trunk
mls qos trust cos
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Oct 7, 2012
We have QoS configured throughout the company, but the standard config we have applied across the 3750 switches only includes the below: We have IP phones (not cisco) attached that are marking with EF, and the PC is an untrusted end device (so needs to be by default marked as zero).Is the above enough to trust VOIP DSCP EF without resetting it to DSCP 0, or do I also need to add a trust line (i.e.: mls qos trust dscp)?
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Aug 1, 2012
Are there any differences between the autoqos commands on a WS-C2960S switches (or in any other series)? Follow the commands:
- auto qos trust
- auto qos voip trust
I was checking the documentation on this link:
URL
And couldn't find any great difference between the two commands, as far as I could see they'll set the Ingress and Egress queues the same way.
Are there any differences between those two commands (auto qos trust and auto qos voip trust)? If so, when should I use one and the other?
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Dec 24, 2012
i would like to know the possibility to use mls qos trust dscp with service-policy in the IOS ver.12.2(25)SEE2.The specific version is not possible to configure like below.
Cat3750(config-if)#do sh run int f1/0/1
Building configuration...
[code]....
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Jun 20, 2012
I have some 2960 switches with Lan Lite ios in my infrastructure.And I try to configure them to support "trust device cisco-phone" and "switchport priority extend cos 0" on ports with cisco phones.But LAN Lite image does not support "mls qos trust device cisco-phone".can I use any workaround to trust cos of cisco phone and to remark PC traffic with cos 0?
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Oct 27, 2011
I've just been testing QOS on 3560 with version 15.0(1) and it seems the the default qos trust behavior on access ports has changed. By default the trust state of a port is not to trust anything, however rather than rewriting the DSCP value of the incoming packets and settign it to 0 the switch now seems to leave the DSCP value unchanged.
SW04-C3560(config)# do sh mls qos int g0/2
GigabitEthernet0/2
trust state: not trusted
trust mode: not trusted
trust enabled flag: ena
[Code]......
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Dec 21, 2011
how can we upgrade 6500 non modular ios to normal 6500 ios?
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Jan 21, 2012
As per my understanding 6509 all slots are dual channel, so 9 slot * 40 per slot (20 g in and 20 g out) = 360 GB How cisco claim the 720 ?? What about the 6513 chassic switch fabric connection?
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Sep 20, 2012
I am seeing a strange situation on my 6500 switch?By having snmp walk on '1.3.6.1.4.1.9.9.109.1.1.1.1.3' (== cpmCPUTotal5sec), I came to know that there are two processor and the cpu util for switching processor is gone to 88 % and some time creeps to 99 %.
snmpwalk -v2c -c "removes" sw6500 '1.3.6.1.4.1.9.9.109.1.1.1.1.3'
SNMPv2-SMI::enterprises.9.9.109.1.1.1.1.3.1 = Gauge32: 12 (--- this is for CPU of Router Processor )
SNMPv2-SMI::enterprises.9.9.109.1.1.1.1.3.3 = Gauge32: 99 (--- this is for CPU of Switching Processor )
but when I do sh process cpu on the console, all looks normal as it shows cpu utilization of RP. why the value is so high on the switching processor ?
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Jan 24, 2013
For intervlan routing, Is 'IP routing' command enabled by default on a 6500 series switches based on the IOS?and on 3750 switches, do we need to enable the "ip routing" command manually for intervlan routing?
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May 9, 2013
I'm looking to restrict Inter-VLAN routing through L3 switch (cisco 6500) and wanted to know best possible way to do it. I used VACL and achieved success to some extent, but my config is making clients take up to 5-6 mins to authenticate IP address from the DNS (bootps).My VACL config was as follows:
Subnet to restrict is 10.100.15.0 (VLAN 15)
STEP 1: Created extended ACL to allow bootpc/bootps through DNS
ip access-list extended EACL_DNS
permit udp any eq bootps any
permit udp any eq bootpc any
STEP 2: Created standard ACLs to allow only relevant subnet, server VLANs & some IPs from other subnets for printers/scanners etc.
ip access-list standard SACL_VLAN_15
permit 10.100.15.0 0.0.0.255 (the subnet I'm restricting)
permit 10.100.50.0 0.0.0.255 (server VLANs)
permit 10.100.25.45 0.0.0.0 (printer in another VLAN which has to have access in VLAN 15)
STEP 3: Created VLAN access list
vlan access-map VACL_15 10
match ip address EACL_DNS
action forward
vlan access-map VACL_15 20
match ip address SACL_15
action forward
STEP 4: Applying VLAN Access list on VLAN 15 vlan filter VACL_15 vlan-list 15 Though the above works, below is noted:
1. I'm still able to PING 10.100.15.2 (the switch virtual interface) from outside the subnet, which I don't intend to do so. Howeve all cients in the subnet have no connectivity from outside the VLAN 15.
2. As mentioned its taking quiet some time to negotiate with the DNS server at system boot time.
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Jun 2, 2012
I used to "ip routing" command in order to enable inter-vlan routing, for example with 3750 cisco. I have a 6503 cisco with SUP720 MSFC3. I was able to create some vlans but I can not configure inter-vlan routing.
sw#conf t
Enter configuration commands, one per line. End with CNTL/Z.
swsur(config)#ip routing
[Code]....
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Oct 30, 2011
For intervlan routing, Is 'IP routing' command enabled by default on a 6500 series switches based on the IOS?hes, do we need to enable the "ip routing" command manually for intervlan routing?
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Mar 16, 2013
Where is the "ip routing" command in Cisco switch 6500 series?
is the ip routing enable by default accoridng to the: [URL]
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Nov 25, 2011
i would like to check out what's the difference between the naming convnetion for the 6500 IOS.
I read the data sheet to support my POC deployment to support NCS v.1 the 6500 IOS need to upgrade to 12.2 (33) SXI
Is it able to work if i using SXJ instead of SXI, with the same IOS version 12.2 (33)?
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Jul 24, 2012
I have tried to test copy tftp: numerous time with no success. I believe the reason it is failing is my laptop to Ethernet port is in vlan 62 and the tftp process operates in a different IP space.I am using gig 7/1 and configuring my laptop nic for x.x.x.254 mask 255.255.255.0. I can ping from laptop to gateway) and I can ping from the switch to my laptop using ping vrf production x.x.x.254. Can you tell me what vlan I need to set my laptop connection in or if there is something else I need to change to make tftp work on vlan62?Does TFTP only work in vlan1 or can it be changed?
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Mar 25, 2012
how to upgrade IOS in switch 6500 connect in VSS from 12.2(33)SXI IOS to 12.2(33)SXJ?
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Jul 16, 2012
We are setup like a hotel style workers camp. We have wings full of rooms and residents with 3750 stacks in them. Those switches connect back to our core 6500's. The network is mostly all Layer 3, interfaces are routed with IPs.
When it was built before my time they included an ACL for each wing so that residents couldn't access internal devices (IE SSH to 6500) but I've come to notice it's not working.
I see hits on the ACL for accepts but nothing is hitting the deny rule at the top.Here is the configuration below:
mls qos aggregate-policer INTERNET1 24000000 80000 80000 conform-action transmit exceed-action drop
mls qos aggregate-policer INTERNET2 24000000 80000 80000 conform-action transmit exceed-action drop
mls qos aggregate-policer INTERNET 24000000 80000 80000 conform-action transmit exceed-action drop
[Code] ....
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May 6, 2013
On googling I came across documents that say OTV (Overlay Transport Virtualization) is supported on Cat 6500. Any authentic information whether OTV is supported on Cat 6500, especially with Sup-720B? FYI, Cisco Feature Navigator does not mention it.
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Mar 19, 2012
SUP2T-D#sh proce cpu hist
11111111111 1111 1111 1111 1111
0000000000099999000099999000099999999990000999900009999999
0000000000099999000099999000099999999990000999900009999999
100 **********************************************************
90 **********************************************************
80 **********************************************************
70 **********************************************************
60 **********************************************************
50 **********************************************************
40 **********************************************************
30 **********************************************************
20 **********************************************************
10 **********************************************************
0....5....1....1....2....2....3....3....4....4....5....5....
0 5 0 5 0 5 0 5 0 5
CPU% per second (last 60 seconds)
SUP2T-D#sh proce cpu sorted
CPU utilization for five seconds: 100%/83%; one minute: 99%; five minutes: 99%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
416 3324188 879928 3777 13.05% 14.42% 14.45% 0 Spanning Tree
633 104408 5091 20508 1.50% 0.53% 0.45% 0 Env Poll
75 22000 298 73825 1.10% 0.13% 0.07% 0 Per-minute Jobs
168 69696 163563 426 0.39% 0.23% 0.22% 0 slcp process
2 532 1010 526 0.07% 0.00% 0.00% 0 Load Meter (code )
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Feb 17, 2013
I am trying to guarantee 100mbps for a vlan across a gig link. I have done some research and found this command for switches
mls qos srr-queue input priority-queue 2 bandwidth 20
However it doesn't seem to work for my 6500. I know the 6500 uses PFC for QOS but I have no idea how it works. how I can guarantee a vlan 100mbps across a 1gig link?
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Jul 12, 2011
We are getting ready to start testing Quad VSS for our production VSS environments we have done the research and per documentation it seems pretty straight forward.
I want to make sure that the dual to quad VSS is easily done across our multiple VSS setups and I am curious of those that have done this already have you ran into any gotchas on the turn up of the ICS Sup?
Also, just a ICS in a single chassis instead of one in both chassis of the VSS?
In one of our environments we have all single home devices going to VSS switch 1 and only dual homed devices. going to switch 2 so may be desireable to only install an ICS in the switch 1 VSS.
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Aug 9, 2012
Cisco 6500 with 2T supervisor engine with following software Cisco IOS Software, s2t54 Software (s2t54-IPSERVICESK9-M), Version 15.0(1)SY1, RELEASE SOFTWARE (fc4)
The problem is that, I am not able to configure Multilayer Switching (MLS) (mls rp ip) in the global config command. Although the "mls" is visible on the config menu. but when I say "mls ?", the router prompt "unrecognize command"
Not sure if SUP 2T support MLS or it come with different name.
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May 21, 2012
I have WS-C6509-E chassis with VS-S2T-10G supervisor.
Currently I have IOS " S2TIBK9-15001SY - Cisco CAT6000-VS-S2T IOS IP BASE FULL ENCRYPT "
Can I upgrade the IOS to " S2TISK9-15001SY - Cisco CAT6000-VS-S2T IOS IP SERV FULL ENCRYPT " without purchasing this IOS?
Will I face issue in TAC cases?
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May 23, 2012
Someone had told me the 6500 switches can be stacked via fiber. This feature is available for the 3750s?
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Jan 15, 2013
I have this message "DHCP Timeout"on few cisco IP Phones .try to assign IP manually and it's working fine.. seems DHCP not giving IP's to those.. 6500 have configured as DHCP pool.
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Dec 6, 2012
i have server with two uplink to pair of 6500 non-VSS, this server member of vlan 100 sw-1 is active HSRP while sw2 is a standby HSRP , how can i make this server forward traffic on both Link . the server admin told me only one link is active (green) on the server while the other link is orange
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Mar 19, 2013
I am looking for a way to see packets that are matched on certain ACLs in a CoPP policy map. I have read that it is not a good thing to add the log keyword at the end of an ACL when using that ACL for CoPP. I initially tried to use a logging policy map but the 6500 12.2sx doesn't support this.
how I can see source/destination IP for a certain class in a CoPP policy map?
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Feb 4, 2013
We have an existing network with a core 6500 as a VSS connecting 4 buildings with 4500 chassis under which number of L2 switches are connected. Currunlty we are using RSTP in ring for redundancy but we want to use OSPF in LAN for faster conversion.All the VLAN's are created on 6500.
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Feb 3, 2010
We've been mocking up a test lab to test VSS on two 6500's. Each 6500 has one sup720 and a 6708-10ge blade and we've established the two 10ge links between the two chassis; the first from the each chassis' sup and the second from each 6708.My question is, what happens when the supervisor fails on one of the chassis?
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Oct 11, 2012
I am looking for soem best-practice and useful logging commands on 6500 and 3750 platforms. Some of them I have listed below. Is there any important ones I am missing Also, I need to know what kind of recommended logging level is for buffer and what is loggign level for syslog server?
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