Cisco Switching/Routing :: Sequence Error On Catalyst 4948-10GE Fiber Links
Apr 14, 2013
we have multiple Video production networks, with Video servers (AVID Unity ISIS) connected by 10GE fiber links to 4948-10GE switches. On almost every of these switches, I see more or less "Sequence-Err" interface errors. We do not currently have a known problem because this, and no other errors are seen. But I would like to understand the error, and therefore I would like to find out, what a sequence error means, what the cause is, and what the impact (to a frame) is?
By the way, it is well-known that the ISIS Video server does generate very excessive UDP data bursts. Maybe this matters? On Cisco doc I did not find an answer. The document "Troubleshooting Switch Port and Interface Problems" does unfortunately not refer to "sequence-err".
Here is an example output:
WS-C4948-10GE#sh int t1/49
TenGigabitEthernet1/49 is up, line protocol is up (connected)
[code].....
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Jun 6, 2011
I want to choose a pair of switches for our data center.What I need: 48 x 1GE access ports, 2 x 10GE uplink ports.Nice feature of 3750-X is stacking. So what features has 4948-10GE? Why I should prefer that switch?
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Dec 20, 2010
We are running a small network business and as funs of ciscos we own a some of the 4948s.We are facing an issue with couple of them as we get the below error message
C4K_CHASSIS-3-INSUFFICIENTPOWERSUPPLIESDETECTED:Insufficient power
supplies present for specified configuration
First thought to replace the power supply didn't actually work as we did that with no result.Power consumption is not an issue as well because all other 4948s work fine with 1 power supply (forgot to mention is 1 power supply in all of them).
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Jun 5, 2013
We had to transport one of our 4948 10 GE to another Data Centre and when we got it there and tried to power up its System Status LED was red and we cannot even get console to the device.
We can try to see if the switch is completely dead and needs replacing or is there something we can do to get it back up and running again?
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Aug 3, 2011
I am trying to setup the management vrf on the 4948 10GE so that my TACACS requests will use that vrf for out-of-band purposes. The vrf is working properly because I can ping the TACACS server using the vrf but the logins do not work. I see this error in the tacacs debug:
TPLUS(00000016)/0: Connect Error No route to host
Looking at the release notes, it states that my version (12.2.54 SG1) does support vrf aware tacacs but the documentation seems to be a bit off because i do not get a server private command option as stated in the configuration doc after configuring a tacacs server group:
[URL]
Here is my config:
ip vrf mgmtVrf
rd X:X
!
interface FastEthernet1
ip vrf forwarding mgmtVrf
ip address x.x.x.x
[code]....
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Oct 25, 2011
ive updated my catalyst 4948-10GE to version 15.0(2)SG1.Now it is not possible to login by ssh or telnet on this switch. the access is established over the mgmt-Interface and vrf.i get a ping reply but login is no more possible now.is there an new feature in this version for vrf or remotelogin that has to be configured? if neccessary i can paste the running-config here.
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Dec 22, 2012
We have Cisco 4948 switches running in production. We want to moniter the trunk link through SNMP.If trunk link fails SNMP need to send notification to server.
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Sep 24, 2012
Current Situation:We are able to reach server IP -10.203.206.40 from our 4948 switch vlan 10.30.1.0/24 through the Layer 3 interface between 4506 and 4948.
Requirements
==========
1) Now we would like to add one more L3 interface between 4506 & 4948 for redundancy purpose.
2) Make available Vlan 540 in 4948 from 4506... need to create two trunk links between 4506 & 4948 and allow vlan 540.
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May 29, 2012
I am doing image upgrade on Catalyst 6509-E. During TFTP image transfer to sup-bootflash I always see !!!!!!!!!!!!!!!!!o!!!!!!!!!! "o" out of sequence packet. Although the image size seems to be correct at the end but there is always some "o" packets.
I am assuming not, but I haven't tried loading with the image after seeing this.
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May 15, 2012
we have Supervisor Engine 720 10GE (VS-S720-10G) in slot 5 on Catalyst 6509-E. Slot 6 is free. We need to replace VS-S720-10G. Is it possible the following scenario
1. we will insert new VS-S720-10G into the slot 6
2. then we will remove the faulty VS-S720-10G from the slot 5
Will everything work without interuptions. Is any document where I can find step-by-step procedure how to replace VS-S720-10G ?
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Dec 23, 2012
I describe an issue when i need to performe an L2 or L3 Etherchannel from a Catalyst 4948 IOS Enterprise and 2 xCatalyst 6506E bandled with VSS.
From the VSS Side when i plug cables i see on the physicals and Etherchannel that Physical and protocole layer are up. On the 4948 side, I see that physical layer is up and protocol and Etherchannel interfaces are down.
On the Etherchannel port summary i see that the port state is supended.
On the first attempt, i have test with a L3 etherchannel on both side using no switchport with two IP addresses one at each side on etherchannel interfaces.
The etherchannel are bundled with LACP mode active and on the second attempt with PAGP mode ON.
The same configured on VSS 6506E work fine with Catalyst 3560E.
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Jan 5, 2011
I have got a new 48port Cisco catalyst 4948 switch, which I configured as a VTP client and connected to Cisco 3750 which is a VTP Server (this switch is on production network). I connected port g1/0/48 from 3750 to port g1/48 on 4948 through a straight cable and made both ports as trunk port (I also tried through cross cable). The problem is these two switches are not detecting. For testing I connected a PC directly to one of the port on 4948 (making that a switch port) still the LED on switch didn’t glow up. Is there any special command needs to be run on 4948 switches to activate its physical ports?
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Jan 4, 2012
I'm using a Catalyst 4948. It seems to drop all truncated packets. I don't know whether this is an expected behavior.I'm developing a program which processes packets in the following steps:
1) capture packets
2) if a packet is too long, truncate it to a certain length
3) insert a vlan tag (say 100) to each packet
4) send them to the switch
Mac address learning is disabled on the vlan 100, so the packets should be seen at all ports of the vlan. However, I only observed untruncated packets. Truncated packets seemed to be dropped by the switch.The summary of the source port is:
c4948-01#show interfaces gigabitEthernet 1/22 summary
......
Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
-------------------------------------------------------------------------
* GigabitEthernet1/22 0 0 0 0 4018000 7390 2000 3 0
The receiving speed was approximately equal to what I sent.The summary of another vlan 100 port is:
c4948-01#show interfaces gigabitEthernet 1/18 summary
......
Interface IHQ IQD OHQ OQD RXBS RXPS TXBS TXPS TRTL
-------------------------------------------------------------------------
* GigabitEthernet1/18 0 0 0 0 0 0 3000 4 0
Almost no packets were output.I see a Cisco document says "ingress port drops corrupted packets" [URL] then my questions are:
1) Is this the root cause of dropping truncated packets?
2) What criteria does a switch use to check corrupted packets? My understanding is that truncated packets could have wrong L3 and L4 data, but they can't be detected at L2.
3) If switch drops mal-format packets, can we disable this feature?
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Mar 13, 2013
My cisco 4948 switch is generating the below error,how do i troubleshoot this error.
*Mar 13 00:09:33.451: %C4K_L2MAN-6-INVALIDSOURCEADDRESSPACKET: (Suppressed 14 times)Packet received with invalid source MAC addre ss (00:00:00:00:00:00) on port Gi1/37 in vlan 1Gi1/37- to this port another 2950 switch is connected by trunk link.and to this switch end host is connected i.e.thin client
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Sep 21, 2012
I'm trying to upgrade some of the netwotk in my workplace.To do this I have istalled a 24port Catalyst 3560X switch.I'm looking to link it to my exsisting network via fibre.
I spoke to a local Cisco supplyer who recomended the above switch and an Allied Telesis Media converter.
I cannot seem to get the Allied Telesis unit to connect to the cisco switch.I have proved the fibre link by connecting 2 AT Media converters over the fibre.Do I have to enable something on the Catalyst switch or is the AT Media converter not compatible with the Catalyst switch?
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Sep 4, 2012
We have a core switch with the following ios and supervisor engine. Can we add a16 port LR (x2)or LRM(X2) ON the core switch?if not what modifications has to be done?if an ios upgrade is necessary is it a costly affair?At present we have two 1gb up link modules in single and multimode fiber .
#sh moduleMod Ports Card Type Model Serial No.--- ----- -------------------------------------- ------------------ ----------- 1 16 SFM-capable 16 port 1000mb GBIC WS-X6516A-GBIC SAL0803T308 2 48 SFM-capable 48 port 10/100/1000mb RJ45 WS-X6548-GE-TX SAD07500600 5 5 Supervisor Engine 720 10GE (Active) VS-S720-10G SAL1439UMZK
#sh versionCisco IOS Software, s72033_rp Software (s72033_rp-IPBASE-M), Version 12.2(33)SXI4a, RELEASE SOFTWARE (fc2)Technical Support: [URL] Copyright (c) 1986-2010 by Cisco Systems, Inc.Compiled Fri 16-Jul-10 19:51 by prod_rel_team
ROM: System Bootstrap, Version 12.2(17r)SX7, RELEASE SOFTWARE (fc1) uptime is 1 year, 27 weeks, 4 days, 23 hours, 30 minutesUptime for this control processor is 1 year, 27 weeks, 4 days, 22 hours, 58 minutes(code)
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Oct 15, 2012
I want to connect a Cisco small business switch (sf302-8) to a Cisco catalyst 2960S over a multi mode fiber. The transceiver I am using in the catalyst is a GLC-SX-MM. I presume in the SF302, I will have to use a MGBSX1. My question is "are these transceiver compatible with each other and if not, is there a transceiver that will suit both pieces of hardware?
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Sep 20, 2012
I have a question regarding fabric storage and cisco catalyst switch 3650.My plan is connecta a esxi server to a nexus switch and then to a san storage. I want add a new switch to have a redundant link between esxi and the storage.Can I use a cisco catalyst 3650 with a fiber conecction to connect the HBA esxi server card to 3650 sw and the SAN storage to the 3650 sw ?
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Dec 8, 2012
I have a Cisco catalyst 6513 with sup720-3bxl and WS-X6724-SFP modules , the switch was working fine until yesterday ,but after a maintenance the modue WS-X6724-SFP failed to bring online , the error code is (Module Failed SCP dnld) does it mean the module has hardware problem or i need to replace it ?
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ios version
s72033-adventerprisek9_wan-vz.122-33.SXH7.bin
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
show module
Mod Ports Card Type
Model
[code]....
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Mar 28, 2012
I have a Catalyst 2950G when I activate the switchport port-security, but I want to empty the black list of mac address because every time I connect a device, the port is automatically désacative, here is the port configuration:
!
interface FastEthernet0 / 2
switchport access vlan 17
switchport mode access
switchport voice vlan 51
[code]....
I tried the following commands to clear the blacklist mac address of that port, but the problem is still relevant:
# Clear mac-address-table dynamic int fa0 / 2
# clear port-security all int fastethernet 0/2
# clear errdisable interface fa0 / 2 vlan
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Sep 13, 2011
We recently switched two of our branches to point-to-point fiber connections to our corporate office. Previously they were using MPLS connections. For branch A, the ethernet handoff of the fiber is connected directly to a Catalyst 3750 gigabit port. That port has no configuration on it. The other end of that fiber is connected to a gigabit port on the 3750 switch at our corporate office. That port is configured with an IP address that is within the subnet of branch A, and is operating at layer 3 due to the no switchport command.
Branch B currently has a Cisco Express 500 ethernet port (with no configuration on it) connected to the fiber hand off there. At first we setup a port on the 3750 at our corporate office that is connected to Branch B via the fiber in the same manner. This resulted in us receiving DCHP leases at Branch B from Branch A. Obviously not desired. Now we have the port on the corporate 3750 that is connected to Branch B's fiber configured with switchport vlan 64. I also configured interface vlan 64 on that switch at corporate with an IP address from the branch B subnet. We then set that IP address as the default IP address for devices at Branch B.
We are having trouble with both an ATM and a phone system not communicating properly at Branch B. At Branch A we are experiencing the same oddity with the phone system, but the ATM is able to communicate fully. At branch B, when configuring a Windows Vista or Windows 7 laptop with a static IP address that is known to be available, you get transit failures when trying to ping. Essentially everything seems to be able to route fine, but some traffic even after a full tcp hand shake seems to not transmit properly.
When you configure a point-to-point fiber connection from a layer 2 switch at a location without a router to a location with a Cisco Catalyst 3750 switch as the endpoint, what is the best way to configure both sides?
Currently we only have vlan 64 configured on the port mentioned on our switch at corporate, and then the switch at Branch B is essentially operating as an unmanaged switch at the moment with all ports in vlan 1.
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Jan 19, 2012
What key sequence to go into ROMMON mode from the console port for VSS system with 2 VS-S720-10G?
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Jun 5, 2012
I tried to configure netflow without success.
Setup is the following.
Cisco Catalyst 6509 with Sup720-10GE IOS 12.2(33)SHX7. There are around 30 L3 vlans configured on the switch. I'm only interested for the traffic on one L3 vlan which is the connection to wan cloud.
I wanna see only the traffic that goes to and come from the wan. On other Catalyst where I have routed interfaces i successfully configured netflow. I read a lot in the forums and documentations but i didn't find the right one.
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Nov 17, 2011
How to confirm if a 10Ge interface can be set down to 1Ge if required ?
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Nov 18, 2012
I am in front of a choice what to select to deploy 10Ge in my datacenter to get four 6504e and two 3750x units connected to each other.All devices are located in 3-7 meters away from each other.The choice is whether to go for a multimode fiber and 10GBASE-SR X2 Modules OR cat7 UTP and 10GBASE-T X2 pluggable transceiver.Money wise it doesn't matter.Fiber looks less attractive since it's fragile and a bit harder to put in underfloor area.Cat7 is more attractive but there are 2 points:
1) I couldn't find ANY single photo of a 10GBASE-T (a module with a single RJ45 port). How does it look? Does it come with a cable or...??
2) How stable is it to run 10Ge over UTP?
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Jan 28, 2013
I have a two Cisco 4510R each with two sup V-10GE redundant. The code on these sup modules are 12.2(31r)SG3. I need some assistance in getting this setup worked out. I have all four of the 10GE populated with appropriate optics. I setup a link from one 4510R to the other using these interfaces. From the documentation I found I had to use Tengi1/1 and Tengi2/2 as the redundant pair. I plugged the up link into these ports. The Tengi1/1 (active supervisor) links up and works fine. But when I look at the ports port Tengi2/2 it isn't showing link or active. Now port 2/1 (nothing plugged into it) is showing as active.
Now is the redundancy supposed to be 1/1 and 2/1? If so, the switch is in production, when I move the connection over from 2/2 to 2/1 will it cause a outage? The reason for this is I now have a system with a 10G port and would like to utilize one of the other 10G ports. Is that possible? Or does it have to be a lag/redundant up link to work (say to another switch)?
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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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Jun 17, 2012
What does RP drops entail? We are experiencing 0.23 % drops on an vlan int on one of our 6500. This interface is an L3 to a server-subnet. Doing a sh int vlan 238 switching shows 30935411 RP (Route Processing) drops.It was a bit unclear to me in the thread "Input queue drops on 6500 vlan interface" if RP drops was through the router, or to the router(mgmnt)?I can do a netdr to see what traffic goes to it. It should not generate CPU load, but I think I will wait until after hours before I try that command.
- do NETDR:
-- debug netdr cap rx vlan 238
-- show netdr cap
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Jan 22, 2013
We have two 3750 stackable switches in core layer.
1. We are planning to stack two 3750 for greater bandwidth to use
2. We could configure 10GE link (by Network module) between these two switches
which solution provides increased bandwidth and redundancy?
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Feb 7, 2013
I am trying to configure a 6509 as the passive receiver from a Dell Force10 10Ge switch with 2 sfp to 2 gig ports on our 6509 switch, I see LACP is up on both sides but cannot pass traffic, I have only 2 vlans that will carry across the aggregate link from our vmware boxes, this is just a temp until I get a 10ge in our 6509 chassis.
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Jun 4, 2012
I am getting conflicting info about this, and need to get confirmations.Is the older 6513 (non E) model compatible with WS-X6407-10GE blade?The switch we're getting this for have WS-SUP720-3B, 6000W power supply, and WS-C6K-13SLT-FAN2.From what I read they are compatible if entered in slot 9-13, but I also heard that 10GE modules are not compatible with the non E chassis.
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Feb 27, 2013
I am looking for 10 GE copper 24 ports switch. After any time I come N2K-C2232TM-10GE. However, this switch is fabric extender and it is used with Nexus 5K series switches.
My question is Can I use this Nexus 2K standalone as other L2 switches?
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Sep 23, 2012
We have CORE switch model : Cisco WS-C4510R-E with dual SUP 5 - 2 10GE. [code] Now We want to upgrade this IOS to the upgraded version.
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