Cisco Switching/Routing :: Duplex Mismatch Between 2960 (LANBase Image) And 6506
Jan 21, 2010
I have the following issue; I am getting a duplex mismatch between a Cisco 2960 TT-L Switch running IOS 12.2(35) LAN Base Image (Gig0/1) and a Cisco 6506 Switch running IOS 12.2(33)SXH Adv IP Services (Gig2/19).
I have tried several combinations of the duplex/speed settings on both sides but the only that works is setting duplex/speed AUTO on the Cisco 2960 which ends up autonegotiating to HALF duplex and 100Mbps.
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May 14, 2012
I cannot seem to correct a duplex mismatch issue.I have a Cisco 2950 switch connected to a Cisco 2621 router. I am running a per-interface Vlan. I have two fastethernet ports and one NM-1E card installed on the router. One fastethernet port is connected to my gateway router, the second fastethernet port is connected to my switch for one Vlan. The NM-1E Ethernet card is being used for the second Vlan which consists of nine IP cameras. Though the cameras on the Vlan are working fine.Now, the NM-1E card is set to half-duplex. I know that I should be using a fastethernet module like a 1FE 2W or a 2FE 2W card, (which I have,) but the router does not recogonize either one of these cards when they are installed, and yes, they have been confirmed as good cards.
Using Router-on-a-Stick configuration is out due to the bandwidth contention besides the fact that the router I am using it on will not handle this due to the flash being an older version.I have forced the switchport to half duplex, setting the speed to 10. I was getting fewer error messages at first, but they soon increased back to the frequency that they began with.I have set the switchport to duplex auto, but this failed to resolve the issue.Obviously, I cannot force the switchport into duplex full since the NM-1E interface is set to half duplex. Can the NM-1E card be configured to full duplex? I can't seem to find any documentation showing where it can be forced to full duplex mode.Could nine IP cameras just be too much for both the router and switch to handle?
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Jul 8, 2012
I have a 4503 switch (in L2 mode) running 12.1 hooked into a C2950 running 12.1, using regular 4 pair Cat5e cables to connect between them. The 4503 has Gigabit port 2/1 trunking to the 2950's Fa port 0/13.
When I set the duplex mode to DUPLEX FULL and SPEED to SPEED 100 on both switches (for their trunk ports) the link fails, and my 4503 loses connectivity (since it gets it from the 2950).
Here is my config from the switches (per description):
The 4503:
interface GigabitEthernet2/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,100-140
[Code].....
Note, this is the only mode that works (which seems to work fine, but I get TERRIBLE throughput for anything that goes over the 2950.
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May 25, 2012
1 week ago, I got a call from a client that reported a network outage, the client told me that, 3 switch has crashed he try to console but it just hang. I ask him, did you change something? he said he didn't change anything, he just pluged a nortelswitch to the cisco switch number 9, but that switch doesn't crash like the others (3,4,8). I check the uptime, and yes the switch never been powered off..
the topology look like this
____ 6500 ____
/ / |
1 2 3 4 5 ...... 9
the vlan is end to end vlan, so vlan span between all those switches. transparant. this is collapsed topology, core and distribution is the 6500 itself all of the 1-9 access switch are in the same rack, with no loopguard, and bpdu guard configured. and connected to the core using etherchannel. the problem is there is no log available to start the troubleshooting/investigation.
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Mar 2, 2013
I am seeing Native VLAN mismatch errors on my 6506 switches as below [code] Will it(VTP Version mismatch) be the issue for getting the VLAN Mismatch Error ?
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Jun 2, 2012
Seen Duplex MisMatch errors on a N7k with a LAG going to the 5508 WLC? WLC code is 7.0.203.0. I found a BUG that is private to Cisco ( CSCth11041 ) that looks like it, but I want to make sure.
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Sep 18, 2012
In LMS I have a 6513 with several sx 1000 interface setup for etherchannel to catalyst 3750
both sides are set for autoduplex but LMS reports that there is a link duplex mismatch. We just installed the latest patches for the LMS 4.0.1
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Jan 8, 2013
I am trying to upgrade my cisco WS 2960 24 TC-L switch with the IOS image c2960-lanbasek9-mz.122-55.SE6.bin and my existing IOS image is c2960-lanbasek9-mz.122-50.SE5.bin. when i am copying it to flash, it is getting copied but when i tried to boot it after entering command boot system c2960-lanbasek9-mz.122-55.SE6.bin , it gave me an error.
both flash dir and error are attahced herewith.
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Nov 19, 2012
I'd like to know if is it possible to load lan base image on Cisco Switch 2960 TC-S. This model (WS-C2960-48TC-S) come with lan lite image and it's the same (phisically) of the 2960 TC-L (lan base image).If I try to upload the lan base image on flash of 2960 TC-S will works?? ..or the switch goes damaged?
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May 16, 2013
[code] Can't find any wrong with the switch ports and AP's that can result in Duplex mismatch.The only difference I can find is the AP that is in all duplex missm. log's is used for other Mesh AP's to connect to.
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Sep 5, 2012
I have a 10nos of cisco 2960 switches and 1no of cisco 3725 gigabit switch. all 2960 switches are parallaly connected to 3725 switch though fiber.
all the switches are having same vlan and public ips for management.
Now I want to upgrade IOS for all 2960 switches at a time, how to up grade IOS same time for all switches.
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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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Feb 3, 2013
one of our switches (WS-C2960G-24TC-L). When I try to turn on the lanbase-routing feature using sdm prefer lanbase-routing, it gives me an error (Unknown command). I tried "sdm prefer ?", and lanbase-routing wasn't there (only qos, default and dual IPv4 & IPv6). The switch is running on image C2960-LANBASEK9-M version 12.2(50)SE5.We have another switch (WS-C2960S-24TS-L), running on image C2960S-UNIVERSALK9-M version 12.2(55)SE5, and I can enable lanbase-routing feature. If I upgrade the WS-C2960G-24TC-L to version 12.2(55)SE5, will it be able to do inter-vlan routing? Or is the switch itself totally limited to VLAN configuration only?
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Dec 26, 2011
Cisco let us try a CISCO C3750X- 24T-S Stack (2 switches) ->> IpBase Sofware licence We've 2 Hyper-v 2008 R2 and one SAN Netapp FAS2040 connected via Iscsi.All was working well with this stacks.Hyper-V see Nas Iscsi interface without problem. Even with basic stack config (no Vlan, ect...).Then, after this test period, we bought a C3750X-24T-L stack (2 switches) to replace the stack lent by Cisco.This one is LanBase Software.
With this stack, hyper-v work very bad ! We've got a lot of Iscsi error in the eventvwr.I can't access luns.So, is there a difference between LanBase and IpBase for a iscsi use ?I put the 24T-S config on the 24T-L switch without pb. So config is the same on both stacks...Also i've got a "TestPortAsicLoopback" = "Failed" on the new stack...I've tried with other stack cables. Not better.
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Jul 28, 2011
I have the following configurations for switch to switch connectivety. sh int sh config int
2960 will not take full duplex setting.
Core switch
WS-C4506 cat4000-i9s-mz.122-25.EWA10.bin
FastEthernet5/8 is up, line protocol is up (connected)
[Cdoe]....
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Oct 10, 2011
I'm looking at adding a Cisco 3750-X switch running c3750e-universalk9-mz.122-55.SE1 (IP base license) into a stack of 3750-G switches running c3750-ipbasek9-mz.122-55.SE1.bin Given that the version and feature sets are the same I don't forsee any compatibility issues. Would there be any reason why a universal image wouldn't stack correctly with other switches running the single .bin file?
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Jun 4, 2012
We have some legacy Cisco 6513 switches with the backbone (16-port GBIC blade) MTU set to 1500. It has a WS-X6148A-GE-TX blade as well, MTU set to 9K.
Now we have a customer sending MTU of 1546, their copper interface terminating on WS-6148A keeps flapping. Does the flapping have something to do with the backbone set to 1500? We cant set the backbone to 9K at this moment since it may be intrusive (reuire a reboot).
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Feb 18, 2013
I'm able to upgrade the master of a 3750 stack, but the member fails to upgrade. [code] I couldn't do rmdir flash:update unless I reload chassis... but even after reloading still cannot make the 2nd member to load with the newer IOS.
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Jun 4, 2013
I have C3750X with C3KX-NM-10G, and have-T SFP in slot 3 ( means it is not in SFP+ slot ).I need to set speed&duplex hard to 100/Full, but if I do the link goes down. I have the same settings on the other side, only IOS version is different.I tried other speeds - 10 and 1000, but no one works with Full. When I change duplex to Auto it works fine.The reason why I am doing this on C3KX-NM-10G is because I need to use NetFlow and cannot use the chassis' copper port. At the moment the ports are connected through a copper patch cord, but in full production there will be a radio link in between that requires 100M/Full to be set hard.I am trying to search for any document that would describe this limitation, but cannot find any. Also port capabilities do not indicate duplex could not be set to full:
show interfaces g1/1/3 capabilities
GigabitEthernet1/1/3
Model: WS-C3750X-48P
Type: 10/100/1000BaseTX SFP
Speed: 10,100,1000,10000,auto
Duplex: half,full,auto
Trunk encap. type: 802.1Q,ISL
[code]....
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Aug 12, 2011
3750G-12S-S.Problem description:I had a WS-3750G-12S-S in production with a defective fan tray and needed to change it.I faced to trouble with inter g1/0/1 on the new switch( it worked fine on the old).
Here the config for old switch:
interfacigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 111-113,278,790
switchpmode trunk
speed 100
[code]....
even if I configure speed nonegotiate that does not work.
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Jun 7, 2012
I have a video feed coming into my 3570. It comes in at 5 minute input rate 18777000 bits/sec, 1695 packets/sec. However, the uplink to the router is much different, 5 minute output rate 130000 bits/sec, 28 packets/sec. I am in a lab and about ready to go into testing phase for a project when we discovered this problem, as this video feed is not veiwable on the other end.
Below is the config and capture from the switch.
BLOSSw1#sh int g1/0/6GigabitEthernet1/0/6 is up, line protocol is up (connected) Hardware is Gigabit Ethernet, address is a44c.112f.3506 (bia a44c.112f.3506) MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 1/255, rxload 4/255 Encapsulation ARPA, loopback not set Keepalive not set Full-duplex, 1000Mb/s, link type is auto, media type is 10/100/1000BaseTX SFP input flow-control is off, output flow-control is unsupported ARP type: ARPA, ARP Timeout 04:00:00 Last input never, output 00:00:00, output hang never Last clearing of "show interface" counters 15:16:25 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute
[code]....
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Feb 24, 2013
Will a MTU mismatch in Nexus 7000 affect the performance ? I have a nexus 7000 at one end with MTU set to 1500 and Melanox bx5020(Storage switch) at other end with MTU set to 9600. Storage team is complaining about performance issue related to slowness.Does MTU mismatch plays any role in slowness ??
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Dec 26, 2012
I am just wondering on how mismatched MTU sizes are handled in Layer-2 networks and also inside a particular switches internal architecture.Layer 2 devices do not do fragmentation in the even of MTU mismatch. is this because Layer 2 devices do not re-write header information (like inserting destination IP and next hop MAC into the newly created frame.) i believe this is what they call per-hop behaviour? if this not the reason, then...? assuming this is the reason, let me proceed to my next question. When we set MTU on an interface , there is no mention of direction (ingress or egress), so i take this as means in both directions. so if a jumbo frame comes in on an interface which is set to recieve jumbo frames and forwarding decision is made and the frame is scheduled to egress via an interface whose MTU is not set for Jumbo frames, will the switch drope the frame at the egress buffer? if not, this implies MTU is an ingress property(only for incoming packets). But, again if it drops the packet, then MTU shoud have been system wide or global configuration as opposed to interface level configuration (just like nexus 5000).
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Jan 27, 2013
I have a pair of 5596 running in a vPC with Nexus 2248 connected to each N5596. When I do the command "show fex" I get the following output on the 2nd 5596
Number Description State Model Serial
------------------------------------------------------------------------
101 FEX101 AA Version Mismatch N2K-C2248TP-E-1GE SSI16390705
102 FEX102 AA Version Mismatch N2K-C2248TP-E-1GE SSI163704AD
122 FEX122 Online N2K-C2232PP-10GE SSI16370195
I'm running version 5.1(3)N1(1) on both of the 5K's. I have looked through all the configuration and I am not understanding why I am getting this error. I have tried to look it up on [URL], but not having a ton of luck.
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Jan 2, 2012
I am doing an small project, I have to connect 4 cisco switches SF 302-08 (1 GBIC each one) to a core switch SGE 2000 (4 GBICs). Because of cable length I have go connect all 5 switches with fiber. The fiber termination is multimode LC duplex. My confusion is on the mini GBICs. There is compatibilities issues i been reading. [code]
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May 3, 2012
what is causing " Gigabit port is restricted to full duplex" while trying to hard code speed/duplex on a 4507 switch port?
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Mar 8, 2013
I am configuring multicast in a environment where I have a 4506 at each site (4 total) and a 6506 as the core. Each 4506 is connected via layer 3 to the 6506. I have a mix of 3560s, 3548s, and 2960s connected to the 4506s and the 6506 via layer 2 trunk
I have multiple multicast sources and hosts communicating at a time (multiple cameras sending video / multiple computers receiving video). So this is not a scenario where there is 1 sender and many receivers. This would be many senders (~50) and some receivers (~10)
Sample Diagram:
->3560
|
6506 --> 4506 --> 3548
| |
| --> 2960
|
4506 --> 2960
|
-->3548
I configured ip multicast-routing on each of the 4506s and on the 6506. IGMP snooping is on by default on the 3560 and 2960 switches. CGMP is on by default on the 3548 switches.
I set up PIM sparse-dense mode and IGMP version 3 on each of the layer 3 interfaces for the 4506s and 6506 where they connect and on each VLAN that is sending or receiving multicast. Multicast is working throughout the network, however I am looking to verify the configuration as I scale this out to more clients on the network.
#1 - Is it correct to us sparse-dense mode in this configuration?
#2 - Do I need to configure a rendezvous points using AUTO-RP? (ip pim send-rp-announce INTERFACE scope TTL). Not sure here if I need to designate this and what to choose. Right now I do not have this and it is working, but documentation seems to infer that I need to designate this.
#3 - Is there any other configuration settings I should be considering? I hard to find real world configurations of multicast as examples or people that know multicast routing well.
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Dec 20, 2012
I upgraded the IOS on 6506E, SUP 720-10GE, non-redundant, to a new one, rebooted OK. Switch seems to work fine but "show bootvar" shows the previous IOS name instead of the new one: s72033-advipservicesk9_wan-mz.122-33.SXJ3.bin.Removed the old IOS name on "boot var", gave it new IOS name, "show bootvar" now has correct new IOS name, write mem again and reloaded switch.It booted up OK but "show bootvar" still has the old IOS: "s72033-ipbasek9-mz.122-33.SXI2a.bin".According to IOS upgrade procedure, after all the upgrade IOS steps done, then just "write mem" then the "bootvar: will have the new IOS name, but on my switch it is always has the old IOS name ? How can I set the bootvar to new IOS name?
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Nov 29, 2012
I have a Cat6506. There were 2 Sup 720 in it for redundancy. They told me they had problems with this thing in the past needing to go out and reboot the machine. I need to go out periodically because it goes into ROMMON. I type boot and it comes back up. One time though neither one would reboot. I had to take a third one out there and reconfigure it. Now it is starting to do the same thing. One thing I did notice is they never connected it to an UPS. It is plugged strait into the wall with power going to two outlets. I am beginning to think there are spikes in the power occurring and this is sending it into ROMMON.
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May 2, 2012
connection vss two 6506 which is the conector or speed (10g or1g) Sfp or x2 What is the connection that allows vss
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Dec 7, 2011
Access-group only allows me to set the mode.access-group > mode > prefer > port > int g2/1,Those are the only options available to me, it doesn't allow me to go.ip access-group <name> in or out or access-group <name> in or out.
I realize the commands may be a little off, I don't have a switch nearby. When I get on our 3750 there are no issues, it allows you to apply the ACL the conventional way. I just can't seem to find any way to apply an ACL on an interface on the 6506 though.
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Jun 11, 2013
I'm trying to stack 3750G & 3750X. As discussed in previous threads I am aware of that the version need to match.
Here the switch details:
Switch Ports Model SW Version SW Image
------ ----- -------------- ----------
* 1 24 WS-C3750G-24T 12.2(55)SE7 C3750-IPBASEK9-M
---------------------------------------------------------------------------------------------------------------
* 1 54 WS-C3750X-48 12.2(55)SE7 C3750E-IPBASEK9-M
I have changed the universal IOS on the 3750X to IP base..but they still wont come up as a stack. On the 3750X I don't see any log entry, on 3750G (major version mismatch).
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Apr 3, 2012
We have bought four identical 3750X switches with identical SW-images: 12.2(55)SE3 C3750E-UNIVERSALK9-M
We initially connected two switches, this resulted in forming a stack.With the other two switches we wanted to do the same thing. However, we received the following message:
%STACKMGR-5-MAJOR_VERSION_MISMATCH: Major Version Mismatch (Local 1 - Received 6) with neighbor-1
Both switches will not see each other and the output of show switch stack-ports shows only one switch and both stack ports as being Down.
I did some digging using the show platform stack-manager all command to find out that three of the 3750X's have the stack version number 1.45 and one has 6.45. This would obviously indicate the reason behind the mismatch, but the SW-versions on all new switches are identical!
Checking the CISCO site explains that mismatching of Major version is critical:
Major Version Number Incompatibility Among Switches
Switches with different major Cisco IOS software versions usually have different stack protocol versions. Switches with different major version numbers are incompatible and cannot exist in the same switch stack.
That's all I could find. Nothing about changing the major version number, so all I can suspect is that IOS version needs to be the same.
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