Cisco Switching/Routing :: 6500 MTP / MPO Crossover Cables Or Straight Through?
Jan 20, 2013
I'm looking to deploy a pair of 6500s running VSS. VSS will be established over a pair of 40GBASE-SR4 QSFP+ transceivers in each switch.Do we need MTP/MPO crossover cables or straight through cables to connect the QSFPs?Since the two switches are sitting side by side the MTP/MPO cables will be passed directly between the two racks.As a result there will be no intervening fibre fobots used.
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Jul 17, 2012
UTP cables are crossover cables or straight through??
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Oct 28, 2012
I just got done running CAT 6 wire's into different rooms and placing jacks on the wall which all works correcting going into the patch panel. The problem I am having is that the Access Points on the ceiling I decided to make it a little easier and use regular network cable and cut one end off and place it into the patch panel the same way as all the jacks. The AP's are POE and they are just not getting on the network. Do I need to do something different for this cable?The way I punched all the wall jacks and all the cables to the patch panel is by using section B on the jack so because of me cutting a cable and leaving one end on, should I use A or is there something else I should do?
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Aug 31, 2011
I purchased a D-Link switch that supports MDI-X so I should be able to use only straight through cables according to the manual. My Router (Wrt54gs) also supports MDI-X, yet when I plug a straight through cable from port 4 on router to port 1 on the switch -> then a straight through from port 2 on the switch to my computer, I don't get an IP address.If I connect a crossover cable from the router to port 1 on D link switch -> then straight through from port 2 to computer, it works just fine.I am going to purchase an extra crossover cable to use for this but I'm really curious as to why it wont work this way? DES-1105 is the model of the switch. "THE DES-1105 CAN BE CONNECTED TO ANOTHER SWITCH OR OTHER DEVICES (ROUTERS BRIDGES ETC) VIA A TWO-PAIR CATEGORY 3,4,5 UTP/STP STRAIGHT THROUGH OR CROSSOVER CABLE."
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Feb 9, 2012
easiest way to convert a cat 5e crossover cable to make it a straight? I have 2 PCs networked & am introducing a router & need to covert the cable without having to rewire it if possible.
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Jun 26, 2011
I'm currently training at a PC store.Me and this other guy are trying to figure out some networking.So far we've file shared 2 PCs with 1 crossover cable.Now we're trying to figure out how to do this with 3 PCs and NO hub, switch, router, etc.I have my theory and he has his.
His theory: One of the computers need an ethernet card so 2 crossover cables can be plugged into it.(The MOBOs only have one port to plug in Cat5s)
My theory: Cut 2 crossover cables in half. And put the three ends together so the wires are touching each other, then tape it. For example green to green to green, orange to orange to orange, etc.Here's an example picture: Now I know my theory would work with audio but me co-trainee isn't so sure if it will work with networking.
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Feb 4, 2011
Crossover T-568A to T-568B cables - I thought these were a thing of the past, but I've seen some recent articles talking about them so I thought I'd ask...
I will have the following connections:
Modem to Router
Router to Switch
Switch to PC
Should any of these be crossovers?
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Nov 13, 2011
Can I get a stack cable longer then 3m?
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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
Just received a couple of new 4500e chassis with the 2800ACV power supplies installed. I have not seen the cables they come with standard, the plug ends are considerably thicker than normal, what is the deal, do we need an electrician to come out and rewire or purcahse new powerboards?
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Oct 26, 2011
Does the color strips on C3750X stack power cables mean anything, I mean the green and yellow ones. On all Cisco pictures the green one seems to be plugged in the upper ports. I asked local Cisco representative, but he seems not to be sure. We tried to try different scenarios, and it looks like it does not matter what cable end we use. We do not have any external power supply, only interconnecting C3750Xs.
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Dec 11, 2011
At a customer i've tried to add a new 3750 switch til a running stack.I used the following proccess:
1. connect stack cables to the new switch
2. bootup new switch.
Normally the new switch will become a member of the stack, but here, the switch says its the stack master. I can see that the stack port from the old switches connecting the new is up.The only way i could make it work was to provisioning the new switch as switch nr x, save, power off and then connect it and boot it up.The IOS i the same on all switches.
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Jun 7, 2012
Suppose I have a 3 member stack of 3750x switches. Members a, b and c.I have all 3 members stacked with all 3 *data* stacking cables in a daisy-chain topology. The 50 cm data stacking cable from switch a (on the very top) to switch c (on the very bottom) just barely reached.Of course, that means the 30 cm *power* stacking cable didn't reach between a & c. Right now, the power stacking cable goes from a to b, and then another cable from b to c. Leaving me with a useless extra 30 cm power stacking cable.
My question is, can switch "a" receive power from switch "c" through switch "b"? Is this just a big electrical "bus"? What if the power supply in switch "b" is removed?Just wondering if there is a need for me to get a longer power stacking cable (one of the 150 cm power stacking cables).
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Nov 18, 2011
When purchasing part number WS-C3560X-48P-L is a StackWise cable included or do I need to purchase that separately?
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Mar 13, 2013
I have a customer that has a stack of 3750x switches installed in production and now would like to install the powerstack cables. The switches are in production and downtime would like to be avoided. Can you install the powerstack cables with the switches powered up? I would assume you can, but wanted to verify before doing so.
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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 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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