Cisco Switching/Routing :: 6504 / Supervisor 720-3b Reboot Loop?
Apr 14, 2007
We recently wanted to swap our existing WS-SUP720-base with a WS-SUP720-3B in a 6513 chassis.Had the existing configuration config saved in a txt file and replaced the supervisor. Booting went fine and we pasted in the original config. There was one failure message about unnsupported command but didnt take further notice."boot system flash sup-bootflash:" was probaly the line that the 720-3B didnt support.After wr mem and reload it went in continious loop and rebooting due to inncorrect boot device. Had to put back the old supervisor and have now the 720-3B in a 6504 chassis. Tried some commands in rommon, but are not getting any further.
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Oct 25, 2011
I am having an issue with this device after setting the ip address and rebooting. I have tried renaming the config.text file without success. I have also tried the steps mentioned here: [URL]
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Mar 4, 2013
I recently had to deploy about 4 cisco 1131 AP's to one of our branch location. When configuring them on the controller, i needed to put them in HREAP mode. As soon as i do that and the AP needs to reboot, it will continue to reboot in a loop and indicate the following:
Unexpected exception to CPUvector 1100, PC = 5A9048
-Traceback= 0x5A9048 0x48A8A0 0x4361FC 0x42E078 0x44880C 0x42A280 0x42AA68 0x18A990
[Code]......
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Dec 14, 2012
We have implemented VSS on Cisco 6504-E switches using the 10GE links on the Sup-720-10GE. Two Cisco WLC 5508 controllers are planned to be connected in a LAG configuration, (consisting of eight links per LAG bundle) to each of the 6504-E chassis( Total of four WLC, two for the primary location and two for secondary location). WLC HA feature may be implemented on the primary and secondary WLC controllers using the 7.3 latest code release.
In this scenario, i would like to seek clarification on some of the design /configuration requirements on the 6504E switches:
1. VLAN 100 - 200 is configured for the Active Primary 6504-E switch and VLAN 200-300 for the Standby 6504-E switch. The IP scopes for the VLAN are defined in the 172.16.x.x range on the Primary and 172.17.x.x on the secondary. As there no cross links(Multichassis LAG) from the WLC controllers to the 6504-E switches, is it better off implementing a single common VLAN range on a single subnet block for the VSS, which in the event of say Primary switch failure, the Wireless APs do not have to re-associate with a different IP range on the secondary? What is the best design practise in this case?
2. What is the best practise for implementing a single management loopback address for the VSS domain- is this implemented using a port channel (Layer 3 MEC) as below? and is the loopback IP address on a totally different IP range reference to point 1 above?
Can the VLAN IP ranges on the 6504-E VSS be assigned in two different subnets say 172.16/12(100-200) and 17.17/12(300-400) and the common loopback (lo0) in 172.18.x.x/32 or is it better to have one common 172.16/12 subnet spanning the entire VLAN range (100-400). Cisco documentation describes creating port channels from the line card card physical ports as opposed to just creating lo0 and advertising this into the IGP.
int g1/x/1
desc VSS Management
channel-group mode 101 active
int gi2/x/1
channel-group mode 101 active
int po101
desc VSS Management
ip ad 172.18.x.x/32
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Aug 9, 2011
My SG300-52 is struck in reboot loop after i set tcp congestion avoidance in webui.
********************************************
Boot1 Checksum Test...............................PASS
Boot2 Checksum Test...............................PASS
Flash Image Validation Test.......................PASS
[code]....
i've tried flashing new firmware via xmodem but still have problem.
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Jan 24, 2012
We have a few AIR-LAP1041N-E-K9 and 2106 controller. One of the 1041N began rebooting in a loop. All over AP work fine. This morning, AP normally loaded at once. Two hours later, after AP reboot, situation repeated itself. Output from console:
using eeprom values
WRDTR,CLKTR: 0x85000800 0xc0000000
RQDC ,RFDC : 0x80000037 0x0000018c
[Code].....
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May 27, 2012
We currently have a WS-C6506 chassis with a line-card WS-X6408A-GBIC. Currently we need to replace the chassis by a Ws-6504-E and also the line-card. My question is: What must buy line-card and meets the same specifications of WS-X6408A-GBIC?.
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Oct 17, 2012
We have network topo ( attach file)Two switch run VRRP, if I ping 10.0.10.3 from switch SW-6504-01 with source 10.0.10.2, ping lost one packet every 10 packets.We have other interface vlan with same problem
this is some config:
!
interface Port-channel1
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
!
interface GigabitEthernet3/47
[code]....
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Oct 30, 2012
After rebooting a pair of 6504's configured for vss, both switches show active on the sup modules. A show switch virtual redundancy however shows the pair working in an active/standby mode. We have 6509's in vss pairs and they show active on switch1 and standby on switch2 led's. For the 6504's switch 1 was booted first and then the second switch about 30 seconds later. Is there something different with the 6504's? [code]
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Jul 17, 2012
I'm having with VSS Failover. Currently I have two 6504's setup for VSS with one connection to the sup engine (10Gig__Connection) and the other connection on the Module 3 10Gig Blade and the same setup on the other 6504.My question is: If the active 6504 has a power outage or the link on the sup engine goes down, and the standby 6504 becomes active, what happens when the Failed 6504 comes back online with a higher priority and preempt set? What happens with the 6504 that took over as Active and now eeds to go back to Standby, what's required?
What I'm seeing is once the Standby took over and became Active in order for him to go back to Standby mode it's asking for a reload to take place is this NORMAL?
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May 15, 2012
we need to install a line cards (WS-X4548-GB-RJ45, chassis WS-C4510R-E), on a chassis Ws-6504-E.where I can find information about compatibility?
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Jun 6, 2013
I am trying to reproduce a Spanning-Tree loop in my lab that occurred on Ops, and for the life of me I cannot break it. The loop is very simple:
Cisco 2960------------FW that doesn't forward STP traffic-----------Cisco 2960
This created an STP loop. In my lab, I am substituting the FW for another Cisco 2960 with STP disabled and BPDUFilter on ingress/egress ports to stop the switch from sending BPDU's to the downstream switch to keep it in the dark, as the FW did on Ops.
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Jan 11, 2012
we've had an issue with our network, we have 2 6509 connected with redundancy, which are connected with 2 x 4900 Switches, from which are connected to a ESX Chassis for visualization, the thing is that the ESX stopped working, and the 4900 switches, and the main core were suffering from overload, they hang on it very well, in order to stop the overload, one of the links to the ESX Chassis were disconnected from one of the 4900 switches. The CPU usage from the 4900 and the core(6509) went down below 40%, and then they started to migrate the virtual servers from the chassis to another 2 chassis that were added right after. They were actually working well, but suddenly the 6509 changed to the other supervisor after everything was OK. We were wondering what could have been the cause of this, maybe the virtual servers migrations, maybe the overload from the ESX ? We also had a few question, is there any need to reload the cores every few months as a planned task ? Because the cores have been up for more than 1 year. And also is there any kind of of tool to monitor the CPU status, or the status overall from the cores or the switches ?
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Nov 24, 2012
We have a couple of cisco SGE switches connected to a single DELL, between the cisco switches we have a trunk interface. I'm not sure which setting should be configured on the switches to get it working because a loop is occuring.
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Feb 17, 2013
I have a Catalyst 3560-X PoE that suddenly stopped working. I plugged in via console and below is the output I received. It scrolls constantly and I am unable to enter ROMMON mode or stop it from scrolling. I've read of a possible problem with the IOS version but I'm unable to verify due to not being able to stop the scrolling.
Switch uptime is 4 minutes, 4 seconds
cisco WS-C3560X-24P (PowerPC405) processor (revision A0) with 262144K bytes of memory.
Processor board ID FDO1522R2AY
[Code].....
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Mar 1, 2012
I Like To Intentionally Create A Layer 2 Loop in My LabI have 2960 and 3750 switches and servers with multiple NIC's and also Some PC's and Hubs. Connections and Commands And Features Which Sould Be Disabled or Enabled)
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Feb 19, 2012
we recently had on our network a simple layer 2 loop problem, with big effects.Here is the situation: we have a C3750 switch, with STP activate on all ports.We don't have total control on this switchs, and for some reasons, it is possible that people connect a 2d switch on it (Cisco or non-Cisco).What happened several times is a classic case: a person interconnect 2 ports of this 2d switch, creating a loop. As the loop is created on the 2d switch only, the 1st switch detect no loop, the the uplink port keeps up.Afer this loop created, a broadcast storm occurs through the link between 1st & 2d switch .. and the storm propgates all over the LAN.I try to find some solutions to avoid that. One thing I would like to do is to find a mecanism on the first switch, which can permit to block the uplink port on the 1st switch if it sees the same MAC address as source in the 2 directions.Note that storm control, even configured to a quite low value (ie: 2Mbps) is not efficient enough to protect equipment (we have had big CPU impact on LAN equipments).
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Mar 24, 2013
I have a strange issue where spanning-tree is blocking vlans through a mesh network.Here is my set up.
2-Cisco 3560's that have two trunk ports set with do1q and a native vlan of 2. I'm allowing a client vlan (2) and a voice vlan (103) to come over the trunk. They have a native vlan of 2 so the mesh APs can get an address through DHCP. Spanning-tree loop guard is also enabled.
When connected to the mesh network, the voice vlan is being blocked by spanning-tree. I get the following erros:
000129: *Feb 28 19:24:58.289 EST: %SPANTREE-2-LOOPGUARD_BLOCK: Loop guard blocking port FastEthernet0/1 on VLAN0103.000130: *Feb 28 19:24:58.448 EST: %SPANTREE-2-LOOPGUARD_UNBLOCK: Loop guard unblocking port FastEthernet0/1 on VLAN0103.
Eventually the loop is cleared and the port is set back to a forwarding state from a blocking state. I don't want to disabled spanning-tree loopguard since I don't want to create a loop. The mesh network is supposed to act as a P2P connection between two switches. As a test I disconnected the APs from their trunk ports. I then used a cross over cable to connect the switches and no spanning tree loops occured. The mesh doesn't have STP enabled on it and should just be acting as an over-the-air connection from one switch to another.
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Jan 18, 2012
I have an Extremely Old switch that I need to connect to my network. Because it is so old I don't want it to become the Root Switch.
what is the command to change the priority. (Honestly I don't remember if it has to be a lower number 1 or a higher number ). Always get that mixed up. I've read about root guard, but I would like to prevent it manually. (It is a small network after all)It is a Cisco 2950.
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Apr 17, 2012
Do Cisco Catalyst (IOS) and specially Cisco SG300/500 support a similar feature to HP's Loop Protection or DLINK's Loopback Detection? This is an interesting feature to avoid loops caused by unmanaged switches.
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Jun 7, 2012
I have a bunch of 3750x switches that each have a 10 gig routed link back to a central 4507 (loopback = 172.30.255.255).We carved up a /24 (of course, the /24 doesn't really exist except in our address tracking spreadsheet) into a bunch of /30's for routed WAN links and /32's for loopback addresses.We started on the low end for /30 subnets (ie 172.30.255.0/30, 172.30.255.4/30, etc.).We started at the high end for the /32 loopbacks (ie 172.30.255.255/32, 172.30.255.254/32, etc.)
Well, when I try pinging 172.30.255.255 from the access layer 3750x switches, the 3750x seems to be treating it as a broadcast ping where it lists each member that responds instead of the regular !!!!! response (this makes think something is odd with the 3750x). Of course, only one member responds (the core). But even the core seems to respond with the other end of the /30 instead of the actual /32 loopback (which makes me think something is odd in the core). I could have sworn that I've setup similar topologies without problems (ie, using 10.0.0.0/32, 10.255.255.255/32, etc as loopbacks) and as long as the mask is a /32, it should work.Also, I can ping/ssh to that loopback if my laptop is on a directly connected subnet. But I can't do it from any of the 3750x switches (which are also directly connected).I've double checked for overlapping subnets, but nope. I don't see any. Routing looks fine. The actual /32 is being propagated everywhere properly.
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Jan 19, 2012
I have a 3925 Router with a 48 port switch module (part number SM-D-ES3G-48-P). I have no problem accessing the 3925 Router, but when I go into the 48 port, I get an error that reads
Error Hardware not supported by firmware. Try loading a newer software instead. System Resetting...
I know that the wrong IOS is installed on the switch, but the problem is that this is an endless loop. The switch resets then comes back to the same error. How to get the switch out of this loop so that I can load the correct IOS.
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Aug 18, 2012
The following error was seen on the switch and the Diagnostic Test Loop back failed following a new WS-6748-SFP module installation.Fabric in slot 5 detected excessive flow-control on channel 3 (Module 4, fabric connection 1)
Tried Hard reset of the module and still the error persist.
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Nov 7, 2012
I have a couple of 3560 switches running c3560-advipservicesk9-mz.122-44 and they are randomly experiencing the following:
- The switch locks up with no preceding error message in the log (I am forwarding syslog to Splunk).
- Upon reboot, the switch goes through the normal startup sequence with no error messages, then for some reason reloads the flash and starts all over again. (refer to doc)
This could happen after days or weeks. Sometimes they will go through two of these reloads on boot and be fine for awhile, and other times they will be stuck in the loop infinitely. I am using this same image with all of our 3560s, but am only having this issue with two of them.
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Apr 18, 2013
i have a standalone SUP720, no traffic is passing through it. only one port connected for remote telnet, its kind of backup device.today i checked its log, and there are some wiered message.is it a software bug or my SUP has gone bad? [code]
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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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Jan 30, 2013
How the port numbering would be on Sup 7-E and Sup 7L-E? I mean, on Sup-6E and Sup-6LE, if I used a twin-gig converter, I used ports gi3/3,gi3/4,gi3/5 and Gi3/6 [If the sup is in 3rd Slot]. I know there are now 4 ports on the Sup 7 which can either be used as Gig ports or TenGig ports. So, how will the port numbering change ?
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May 1, 2012
Nothing happens when we plug a USB Flash Drive into an SUP7L-E USB port.
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Feb 20, 2012
I have a 4510R-E chassis which currently has a single supervisor 5 installed.
We are now looking at upgrading the supervisor to a Sup6. Now the question is this, can I install the Sup6 into the redundant cpu slot and then perform a failover to get the new switch working without any noticable downtime.
I'm not sure what having a Sup V and a Sup 6 in at the same time will do to the backplane.
Otherwise I have to take the switch down and then install the card and software manually.
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May 6, 2013
We have a scenario with 2 chassis, both with 2 supervisor Engine 2T, we try to make a configuration of VSS with the chassis and would link to know if is possible have 2 supervisor on chassis one and 2 supervisors on chassis 2 with VSS?
Router#sho switch virtual redundancy
My Switch Id = 1
Peer Switch Id = 2
Last switchover reason = active unit removed
Configured Redundancy Mode = sso
Operating Redundancy Mode = sso
[code]....
would like to use the second supervisors for obteind the local redundancy en chassis 1 and 2, this is possible?
the actually version on four supervisors is: s2t54-ipservicesk9-mz.SPA.150-1.SY3.bin
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Apr 30, 2013
I need to configure QoS (voice and video) for Catalyst 6500 series switches with Supervisor 2T modules and DFC4 linecards.
Is this radically different from what we do int he Sup32 and 720s? I was looking at some templates online, such as
[URL]
But I don't see anything for the new Supervisor 2T?
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Apr 24, 2013
I'm having a trouble with a 4510R+E switch. The WS-X45-SUP7-E supervisors are constantly rebooting, and we can see a 'critical software exception reload' reason. We have checked the logs
______ uptime is 5 weeks, 1 day, 19 hours, 3 minutes
Uptime for this control processor is 37 minutes
System returned to ROM by reload
[Code]....
What can we do to solve this incident?. Everything was working fine, and suddently the problem arose.
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Apr 15, 2012
I am trying to understand the implicit limit to the priority queue. I know you can define an explicit policer but if you don't I can't find out what the rate limit really is.
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