Cisco WAN :: 3750 ME Configuration With ES Ports?
May 17, 2011
I have an issue with connecting my OPTEMAN 100mb handoff to the 3750 ME ES ports. Because the ES ports will only accept gig connections, I am unable to use the ES ports.
Is there a work-around? It's too costly to have the OPTEMAN changed over to a GIG hand off and I really don't want to put in another piece of equipment to use the ES ports.
Is there a way to have the traffic flow into a 100mb port ont the 3750 and then over to the ES port?
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Mar 8, 2013
In my 3750 stack switch there are more than 10 L3 vlans currently in use.In that only one vlan for example vlan 11 (we given up link directly to the nodes connected to that ports which is in vlan 11)losing connectivity for sometime and again connectivity restored.Except Vlan 11 all other vlans are working fine. When we troubleshooted the issue some of the ip's able to ping and some not able to ping. checked the interface status of that ports (no crc and input errors) and port is in up status only.we also checked cpu utlilisation ,device uptime, all are no issues found. am sharing my sw basic config and one interface status at the time of issue.But only one port learning more than 50 Mac-Addresses dynamically.and am learning mac address violation in another port which is port security and storm control enabled on that port..Its seems to be any attack or something else????
interface GigabitEthernet1/0/20
--More-- description
switchport access vlan 11
switchport mode access
spanning-tree portfast
logs:
Mar 8 05:58:25.848 IST: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0026.0a18.8218 on port GigabitEthernet1/0/16.
Mar 8 05:59:25.862 IST: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0026.0a18.8218 on port GigabitEthernet1/0/16.
AT the time of issue interface status:
sh int gi2/0/14
GigabitEthernet2/0/14 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 0026.ca46.5c8e (bia 0026.ca46.5c8e)
Description:
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,[code]......
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Oct 26, 2011
I've put a C3KX-NM-1G module into a 3750x but can only get ports 1,3 to stand up, ports 2 and 4 dont operate. ports 2,4 are not shutdown and dont come up with working SFPs etc in another switch.
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Sep 27, 2012
I have a switch WS-C3750E-48PD, I had two cameras that use 15.4 W in these ports and two days ago these ports go down, now the ports don't deliver PoE but are good when connect a computer.
SWP-D302-1-1#show power inline
Module Available Used Remaining
(Watts) (Watts) (Watts)
[Code]......
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Jan 31, 2012
I'm not able to set the mtu on an SVI or routed gigabit port on either model. they are running 12.2(55)SE4.
It comes back as "% ip mtu is not supported on this interface".
Also, is there any reason why when the "ip tcp adjust-mss", (set to lower than default) is applied to the egress SVI on a 3750 or 3560x, the mms value of the SYN packet is not adjusted when captured at the receiving end? It seems as if the setting does nothing.
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Jun 4, 2013
I'm trying to configure and etherchannel between 2 switches. A 3750 and a 3750G, but the port channel is down: 3750. [code]
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May 1, 2013
I have two switches, WS-3750-24PS-S connected in two cabs via fiber. Patch panels at both ends with patch leads. Used tester to confirm end to end fiber connectivity. When plugged in, one switch lights up the other does nothing.
Ports are as follows:
interface GigabitEthernet1/0/2
switchport trunk encapsulation dot1q
switchport mode trunk
same at both ends. Tried both GI ports same result. swapped transceivers over and the same result, (one switch lit one not - the same switch in both cases). put both transceiver in each switch, (gi0/1-0/2 in a single switch). on the one that lights up in the original scenario we get link on both ports and they come up, on the other nothing happens. shut down both ports on the malfunctioning switch and no shut them, no change.
Show transceivers doesn't show transceivers on the malfunctioning switch, and no attempt is made to bring the ports up if the fiber is removed and replaced.
it is almost as though the two gb ports are kaput. Anything else I can try?
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Feb 14, 2013
We have a scenario where we want to connect 14 access layer 2950 switches to Core switch 3750 via optical fiber in a LAN.What model of 3750 Switch should we use to tackle this situation.I have learnt that WS-C3750X-24P should support it.Isnt it?
Can we use optical fiber SFP module to connect 2950 switches to core switch?Does Cisco 2950 Switch support optical fiber sfp module?
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Jun 15, 2012
in my production environment two swtiches with stack and all ports are in the same Vlan 2 192.168.117.254 and the default getway is 192.168.117.1install correctely all were working fine but from yesterday onwards some of the ports are getting down automatically and coming up automatically and all devices are having static IP's no dynamic. [code]
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Jun 5, 2012
I have a Cisco 3750G-48PS Running IOS 12.2(40) and was wondering how many physical ports are supported in an LACP Configuration. Is it 4 or 8 ports in a single switch.
If I have a dual 3750 stacked together, and I want to configure (8) port LACP, Can I take (4) ports from each switch in the stack and LACP together.
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Aug 27, 2012
I am receiving the following error message on a Cisco 3750 switch stack. Need troubleshooting this error message.
00:03:13: %SW_MATM-4-MACFLAP_NOTIF: Host 00d0.7400.2730 in vlan 600 is flapping between port Gi2/0/3 and port Gi2/0/2
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Oct 26, 2011
I am working on a request to clean up alot of excess cabling in one of our IDF's. I noticed that many of the connections have no lights on them and probably haven't been used in a long while. I would like to know if there is a CLI command I can run on the Cisco 3750 switch will allow me to bring up a list of ports which have not seen any activity for a period of time - for example, 30, 60, or 90 days.
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Aug 1, 2011
Is possible connect and configuring two cisco wlc in high availability to 3 switches in stack 3750 in difference ports?For example
WLC A (Primary) - SWITCH MASTER
WLC B (Secondary) - SWITCH SLAVE
How can i connect the wlc's in HA to get a redundancy in the stack?
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May 4, 2012
I have a Cisco 1841 router with Fa0/0, Fa0/1 and Se0/0/0:0 interfaces. Fa0/0 is facing the LAN. At the moment WAN interface is Se0/0/0:0. It has following configuration:
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Aug 13, 2012
I'm new to managed networking. So I'm having trouble understanding how to set up my switches properly. I have a closed network with about 20 switches and 2 IDF's. No router, and no internet. I have a SLM 2024 in want to have 4 ports set up with a VLAN. I have another SLM2024 I want to be on the same VLAN some where else. Switch 1 uses port 24 GBIC as and up link port to one of the IDF's. Switch 2 uses ports 12 and 24 copper(LACP) to make a hop from another switch(ports 1 and 13 LACP)which inturn is connected to the same IDF on port 24 GBIC. How do I set up switch 1 ports 7,8,19,20? Also, how do I set up switch 2 ports 7,8,19,20? VLAN 11
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May 28, 2012
We have PC's that connect through the Siemens IP phones and back to the cisco 3750 which is connected to our core 6500 via L3. The phones use a voice VLAN and the PC's use another VLAN. The whole setup seems to work ok but I was just wondering if the QOS was configured correctly. Our current config on our 3750 switches are mls qos trust dscp on the port that connects to the phone and PC and mls qos trust dscp on the L3 links. The phones are configured for "QOS L2/L3"From the reading I've done so far it seems that any ports connected to a L2 device should be set to cos and not dscp?
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Jun 16, 2011
I could do configuration of a VPLS in 3750, I have doubt about whether the configuration is similar to that of 7600, but is so I could recommend some document to observe the configuration.
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Feb 16, 2013
I have two 5548s as core. 8 FEXs are multihomed (advanced vPC topology?) to both the cores.Suppose, I have to configure a bunch of ports on the FEXs, say Eth101/1/10 - 20. I would login to the first core and apply the configs.
My question is - do I have to do the same on the second core also? Or would the first core replicate the stuff to the second core? I know about port-profiles/CFS and such. But, without that would it automatically sync to second core?
For testing purpose, I went to Core 1 Eth101/1/10 and put a description "TEST". Wrote the config. After 5 minutes logged into second core and did show run Eth101/1/10. But, the description "TEST" didn't show up there.
Also, doing sh run on any FEX port is faster on one of the cores and very slow on second core... all the FEXs have 20 GB uplink to core 1 & 2 (so total 40GB in vPC, max pinning 1)
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Mar 19, 2012
i have linksys modem which already running for differents vlans i cerated another different vlans 10 amd 20 for 10 and 20 i need internet how should i configure internet on another core switch3750
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Aug 16, 2011
I have a WCS that I use to manage 8 controllers (2 WiSM's totaling 4 controllers, and 4 more controllers at remote locations). All controllers connect to 3750 switches. The layer three interfaces for all V LAN's that are related to the wireless network are created on these switches. Each layer three interface has a helper address that points the devices in the sub net to the correct DHCP server.
When a wireless device requests a DHCP request I believe it gets to that server based on the relay from the layer three interface on the 3750. However, I know that the virtual interface on the controller is also requesting an address because my firewall is flooded with deny statements. The virtual interface is configured for 1.1.1.1 and so it gets blocked. I am starting to question the use of this interface considering the fact that it is getting blocked and the clients are still getting address.
Are both interfaces trying to act as DHCP relays? Could I setup the controllers to be the only relay (without using the virtual interface)?
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Oct 13, 2011
I've inherited a server running Ciscoworks LMS 4.0 to manage our plethora of switches. Running 'Configuration > Configuration Archive > Synchronization' against a Catalyst 3750 switch called switch1 successfully retrieved the Running, Startup, and VLAN configs.Running the same command the following day on switch1 failed and returned this in the job execution result:Unable to get results of job execution for device. Retry the job after increasing the job result wait time using the option:Admin > Collection Settings > Config > Config Job Timeout Settings I modified the job result wait time setting to be 600 seconds, tried again and received the same timeout failure. I have also seen this same Failed message on other devices, but have never actually received the configs for them, so I feel switch1 is a better place to start.What are the first things I should check in CiscoWorks for a problem like this? Is there a particular software revision I should be on with LMS 4.0? What timeout value should be used for Archive Synchronization?
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Jan 16, 2013
I am writting in response to MAB issue which I noticed a few days ago and I am still not able to undestand what exactly happend. First of all I would like to say that I configured MAB authentication and according to the MAC the ISE configure a VLAN. All worked well: the test computer can change VLAN based on its MAC. The problem appear when I cut the connection to ISE server. Accourding to configuration the switch authorize the new device to VLAN 11 (critical VLAN) That is fine ! When the ISE server is up again I had a configuration which should reauthorize all ports assign in critical VLAN. But why that is not happend ??? It looks as the switch didn't notice that the RADIUS (ISE) was up and working again. [code]
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May 20, 2013
im trying to move the config from an 3750 to 3750 PoE but without using the PoE options.I have allready download the config with tftp and upload it to the 3750 PoE. Now the new config is stored on the PoE switch but some of the old setting are still there. Not sure why, i think the config only overwrite the settings which are in the conf file and the setting which are not in the conf file but enabled on it will stay on the switch.After the upload of the config file I deleted all the config I do not need by hand.They are some settings i can't delete and I don't know why, this are the sittings:
1. each fastethernet port has this option: "no cdp enabled" this entry was no availble on the old switch, is the any possiblity to remove this entry?
2. the same for "no mls qos rewrite ip dscp"
3 and for this one "vlan internal allocation policy ascending"
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May 6, 2013
The access swtich is a Cisco 3750 and the Core switch is a Nexus 5000 series. I am configuring the switchport were the AP (3502) and WLC (5508) is connected below:
For AP: interface GigabitEthernetX/XX
switchport access vlan 244
switchport mode access
[Code]....
The WLC is connected to the Nexus switch and it is not accepting the 'mls qos trust cos' command.
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Jul 27, 2011
We are using 3750 switches as WAN router facing the WAN cloud. To configure QoS for its WAN port, should I use 'auto qos voip trust" or treat it like a router port and configure class-maps, policy-maps, and attact service-policy input or output?
Because switches have different queuing and dropping methods than routers, auto qos can generate QoS configs that are considered most appropriate for 3750 switches. However the switch functions as WAN router. Maybe it should be configured using router type of QoS with policy-maps and service-policy?
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Jan 28, 2012
We have a few stacked 3750 switches with vtp transparent configured...some plugged in a fiber from another network into our stacked switches...that network/switch has vtp server configured...once that switch connected to our stack of switches, it turned that stack switch into vtp server...causing the previous vlans configured to erase thus causing management issues with the stacked switches..
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Feb 17, 2013
seeking for configuration assitance on etherchannel between catalyst 3750 and 6506
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Dec 31, 2011
I have CISCO catalyst with VLANs (VLAN ID 33, 36, 40-53) configured. I need to configure port mirroring in Switch 3750 for NAC (Network Access Control). I need to Monitor all the VLANs. Here is the SPAN configuration of switch: [code] Monitor session 1 source vlan 33 , 36 , 40 – 53.Monitor Session 1 destination interface fa 1/0/8 (here I am not able to set encapsulation dot1q ) because the error occurred saying %one or more dest port do not support the encapsulation%.
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Jul 4, 2012
I have a 3750 stack of 4 switches that was installed about 2 years ago. Recently I was doing some work on the switch and realized that I am unable to save the config. I amobviously concerned that if the power fails or the switch reboots I will be reconfiguring it and that is not something I am interested in doing!
Here is the error that I am receiving:
switch#copy run startup-config
Destination filename [startup-config]?
Building configuration.
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Sep 28, 2011
I am trying to configure a trunk between the above two devices. I like to have vlan11 on ASA. Then I like to connect a host to my switch, and have it communicate with other devices in VLAN 11 or other vlans that reside on the ASA. Below is the config that I currently have.
ASA:
ciscoasa# show run interface Ethernet0/1
!
interface Ethernet0/1
[Code].....
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Jul 3, 2012
I have configured SPAN in cisco 3750 switch as below mentioned. but the destination port protocol is down.
Network Diagram:
switch(config)#monitor session 1 source interface gigabitethernet1/0/1switch(config)#monitor session 1 destination interface gigabitethernet1/0/11 ingress vlan 1
[Code]....
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Jul 16, 2012
Our servers are hosted at the Main site, site office A access to the Main site for Internet and servers. We are thinking NextG to take over when the link between sites goes down.
To start with, what is the configuration for 3750 at Site A and the Main site:
1) Trunking for both switches
2) Routing
3) the automatic failover configuration for the switch at Site A.
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Apr 17, 2012
I am uploading new configurations to my Cisco 3750 stacked switch and noticed that after the load I cannot log back into the switch because my password somehow was changed. After performing password recovery and getting back into the swtch, I noticed the configuration register was 0xF. I have never seen this before. The config-register command does not seem to be supported to change it back to factory default. The switch is on a ship which has several power hits when they switch power from shore to ship power.Can this cause the configuration register to change? What is the best way to change the configuration register?
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