Cisco Infrastructure :: 3750-E How To Reset Baud Rate
Apr 18, 2010
Having trouble resetting the baud rate to 9600 on a 3750-E. Basically the device cannot be set to anything other than 115200 baud rate. I have changed this via startup-config (which lost connection) reconnected and saved config but after reload was back to 115200. Tried via bootloader to 'set 9600' but the termial program paused for a bit then the switch prompt returned. Tried the same to 'unset baud' but the same thing as above happened. I have erased and reloaded flash etc
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Jul 6, 2010
Cannot access console baud rate has been changed by customer and I have tried all the standard ones 1200,2400 ect, have tried the J7 baud jumper on the mother board....?
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Jan 27, 2013
I've configured all my devices in the lab to use 115200 baud rate, so I can speed things up a little at the console. For whatever reason, I can't get my 3550 to save the 115500 baud rate. I power on the switch, hold the mode button, at the switch: prompt I type 'set BAUD 115200' followed by a reset. I power the cycle the switch once more, yet it still holds at 9600. I did the same process on my 3560's and it worked like a charm.
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Aug 8, 2012
I need to use very long console connection it over 56 feet (17m) (I used Cat6 wire with connection on oth ends as console wire 12345678-87654321) According to the below table
Data rate (bps)Distance (m) 2400
60
4800
30
[Code]....
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Mar 18, 2013
how to change the Baud Rate on Cisco 2900 SW utilizing ROMON ?
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Feb 14, 2013
I have a 2921 router with 1 etherswitch module installed. I haven't done it before and was trying to change the baud rate to 115200 for installing an IOS on the etherswitch module which had been deleted. I ended up "unsetting" the baud rate on the etherswitch and rebooted. Now, when I try to session into the etherswitch, its opens the connection but I can no longer see any text on the screen. Im using Teraterm. I've tried different baud rate settings for my serial port in TeraTerm but still cant see any text on the screen. I dont know of any commands from the router prompt. Any suggestions to fix this? If can start seeing the text, then I can probably configure and set up the etherswitch module.
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Oct 20, 2012
it seems that i made a mistake when typing the BAUD rate of a 2960-Switch in rommon.I can't start the switch now, because there is no image on it (because I deleted it before) and the baud-rate has wrong settings. When connecting via console cable i can't see anything (except some strange hieroglyphics) when starting. I tried all the speeds in teraterm... without success.what can i do, to recover the switch back?
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Feb 3, 2013
I need to recover the passwords for my 3750 stack (2 switches), I have the password recovery documentation but it seems to be referring to recovery for one switch. How do I go about recovery when in a stack, should I remove the links on the switches and recover each one separately?Alternatively can I do a factory reset on them
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Jan 15, 2012
I had to format flash and recover. I did the quicker way by using set BAUD 115200...once the .bin was across I forgot to set the baud back to 9600. I have followed instructions: go back to switch: set BAUD 9600 then reset. also tried the unset command. problem is it always comes back up with a BAUD of 115200. CWill I have to label 1 switch as 115200?
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Jul 17, 2012
We have a guest wireless setup but I need to rate limit the users so no one hogs all the bandwidth. The WLC is connected into a 3750 which is doing all the routing between the vlans. I know I cannot shape the traffic on the 3750.
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May 29, 2012
I can't figure this out and there isn't much documentation on the subject online. The reset button just resets the device even after holding it for 10+ seconds and there is nothing in the CLI.
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Dec 24, 2012
I am running the latest version of 12.2(55)SE6 on the catalyst and I am looking for this command "lacp rate fast" but it is not there:
lab-c3750#conf t
Enter configuration commands, one per line. End with CNTL/Z.
lab-c3750(config)#interface g1/0/5
lab-c3750(config-if)#lacp ?
port-priority LACP priority on this interface
lab-c3750(config-if)#lacp
According to this link, it is supposed to work: [URL]Am I missing something?
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Oct 3, 2012
Is it possible to rate limit on a L2 trunk port on a 3750?
current port config and ios are as follows;
interface GigabitEthernet1/0/50
description *** Connection to Fiber Link ***
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,172
switchport mode trunk
end
flash:c3750-advipservicesk9-mz.122-46.SE.bin
i was wondering if the "srr-queue bandwidth limit 10" command would work to limit the output from this interface to be 10 % of the port bandwidth and then the same command could be done on the other side.
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Feb 25, 2013
If I have an interface configured as follows (on a Cisco 3750 Switch)
Interface gi 1/0/24
Bandwidth 100000
And then added the following command
srr-queue bandwidth limit 40
Would the result be 40% of the physical 1Gbps interface or 40% of the 100Mbps Bandwidth set under the interface bandwidth command.
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Apr 7, 2011
i got a big problem, during a configuration reset i got an electrical blackout. I have set the configuration back after a password reset and send the reset prompt. At the restart of the router the blackout take all for 10 seconds out. When i restart the system an connect the router with the hyper terminal i get the following output:
[Code].....
I think the config was lost but how can i restart the router and enter a new one?
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Apr 4, 2011
How do you reset a 1252ag access point that has the mode button disabled?
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Apr 15, 2012
Actually i have problem with my connection and i would like to find that problem. i have 3 sites(1,2,3) connected together through fiber multi mode cable. The site 1 having the control room, the maximum distance between site (1 and 3) is 1.8 Km, the other distance(1 and 2) is 1.2 km and i already used 3750X switch and GIBIC GLC-FE 100Fx with support MM cable up to 2 KM.
i have in site (2 and 3) 10 cctv 3 mega pixel cameras and i check for the bandwidth is less than 100Mbps when i connected the 2 switches(2 and 3)to the switch in the site 1 there is a delay i thought maybe because of the bandwidth so i tried to connect only 1 camera but the same problem(delay). i did not make any configuration for the switches.
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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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Jul 27, 2011
A customer is expanding their network into another wing, and they have a good number of existing Small Business switches (specifically the SGE-2010P - [URL] that they're interested in possibly deploying. They have a full-blown Cisco infrastructure and voice deployment (Cat 6500 core switches, 3750 switch stacks, Communications Manager w/ over 1,000 phones, etc.).
The general concern is whether there is ANY known issues or concerns with trying to mix/integrate the Small Business equipment with non-SMB infrastructure. Looking at the datasheet for this switch, it's clearly PoE, supports QoS, although it doesn't specifically indicate it can provide a voice/auxiliary VLAN for a phone detected by CDP - that would be a big deal. So basically, "a switch is a switch", and I'm just posing this question to make sure there's no reason (technically or from a support standpoint) that we would not recommend integrating these.
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Mar 13, 2013
I have configured a vlan interface on a 3750 switch. there is aprox 4Mb active traffic flowing through the interface, but when I do a "show interface vlan (vlanid)" the output show zero bits in and zero bits out. Its a typical L3 config with one IP on the vllan interface acting as the gateway for the VLAN devices. Is this a normal behaviur ? and if so is there any way to get the traffic in/out stats. The end PC/devices are connected to this switch via an L2 TRUNK and I dont have access to the L2 switch on which the actual devices connect. so cant get the real time stats of those interfaces.
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Oct 17, 2012
I have been asked to do a network survey at a client. They are using the Cisco SGE2000 switch, which is new to me (used to working with 3750 switches). They seem to have lost the username/pasword for one the switches. Is there an way to recover from this, without reseting the whol config (not sure they even have a backup) ..
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Jan 20, 2013
We have a data center with servers set up for different projects, some servers from partner companies and several small LANs. The traffic between all those needs to be controlled and firewalled. The servers and LANs are divided into different subnets and VLANs. Physically, their traffic is aggregated on a couple of 4506 and then sent to a FreeBSD server, where the logical gateways are set up and traffic is filtered between them.The BSD server is dying and having it there is incorrect in the first place, so we are planning to replace it with two ASA (5520) in failover.The question that arises is how to correctly implement firewalling between VLANs. Originally we thought to set up the firewalls in transparent mode and logically terminate VLANs on a stack of 3750 switches behind them, but would that filter the traffic between the VLANs? Then we thought to perhaps terminate the VLANs on the ASAs, use routing mode, and do filtering there, as well. Or should we implement multiple contexts? We have about 20 VLANs and all of them differ in rules of what should go there. None of this can be concidered an "inside" - trusted - zone, nor "outside". Internet and external links are connected and filtered in a different place.
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Nov 14, 2012
I have a 3750 stack as our core switch. On the core switch I have 2 VLANs. One VLAN is for WAN and one is for LAN. The WAN VLAN has our internet router, and the outside interfaces of two ASA's set up as failover. The LAN VLAN has everything else, including our MPLS router for the remote offices. Execs are cheap and want to increase internet bandwidth by purchasing a local home internet service like COX or Time Warner cable to add to our Business internet service with TelePacific which is a bonded T1 at 3 meg. Execs dont seem to care about SLA's and simply will not spend big dollars to increase the pipe. I was looking at those Mushroom Networks appliances but its too expensive for us also. Any way to add additional low cost bandwidth with out current setup? Maybe prefer to keep important internet traffic to the SLA circuit, and then put low priority traffic to the cheap non SLA cable modem if possible.
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Mar 29, 2011
I have a very basic networking question If I have, say, 3750's (or any L3 switch, capable of routing) at the edge and a 4500 at the core, where should I route? At the edge? At the Core? Both?
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Jul 8, 2012
I would like to limit the bandwidth available to a different target machine. I have been trying to do this on a Cisco 3750, but first I came across this message:
% QoS: policy-map with police action at parent level not supported ...
Then this:
% QoS: policy-map child ... ClassMap BackLimit only support MATCH-INPUT INTERFACE
Is there any documentation, I searched the forum but all I see are complex solutions, I just wanted to limit the bandwidth for a machine that is in a different site. I wanted to apply the policy on an interface SVI.
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Jan 26, 2012
actually i have problems with the connection between a Cisco 3750 and P750 server, the Cisco Gbic is X2-10G-SR and the card of the server is 10 Gigabit Ethernet-SR PCI Express Adapter, both uses 850 nm wavelength but i cant see link between the two cards, the physical connection is with a fiber cable with a conector SC in the server and LC (cable adapter) in the switch.
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Jul 10, 2011
We have the next Settings in our SW. We crate an ACL and aplied to a SVI for Incomming Traffic, I understand that is not necesasry to allow the returning traffic in ACL, but we can't access to rdp for example when we add the ACL, if we remove it, the acces is ok, buet when we add again the access is deny, even we have a log entry, and the ACL i just for Incomming traffic. There is no another ACL.
See attached file
[code]...
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Sep 28, 2011
Am not finding the resolution to my infrastucture and getting output drops. Sw1 is connected Sw2 as below stated
Please find the conf:
Sw 2 3750 conf:
interface GigabitEthernet1/0/46
no switchport
ip address 172.16.100.81 255.255.255.248(code )
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Apr 7, 2011
I have set up an ACL on my 3750 switch to deny icmp from PC A on our inside network to PC B on a different VLAN on our inside network using the following ACLs:
deny icmp host 10.1.17.15 host 10.3.10.4
deny icmp host 10.3.10.4 host 10.1.17.15
-- or --
deny icmp host 10.1.17.15 host 10.3.10.4 echo-replydeny icmp host 10.3.10.4 host 10.1.17.15 echo-reply
These ACLs belong to an access-list that also limits ip traffic to a few specific machines.When I try pinging from PC A I receive a reply message back from PC B. Shouldn't this configuration block any ICMP from PC A to PC B and from PC B to PC A? I would have expected the first ACL statement to block any packets associated with ICMP and when that didn't work I tried the second configuration.
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Aug 25, 2012
I have been experiencing a strange problem i have a switch stack of 3750 in which 4 switches are cascaded. there is one one switch shows PROVISIONED status when I run "show switch". i have verified the stack cable connectivity its OK.
now when i try to console that particular switch i am unable to access it as well. I tried to reboot that switch and on reboot it only shows one LED syst blink once and after that remains constant and nothing happens to other LEDS. from the back of the switch FAN is working fine.
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May 14, 2012
I seem to have managed to set a 2960 to 230400 baud in the boot loader. Is there anyway to reset the variables in the boot loader? Maybe a set of pins to short? I can't access the console port reguardless of what I set the rate too. I've tried both the USB console cable and a USB to serial. Is there anything I can do short of an RMA?
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Jan 7, 2013
I will like to set auto baud for the SG500. By default its 115200bps.
I had tried the following methods:
1) switch xxxxx (config)# line console
switch xxxxx (config-line)# autobaud
--------------------> my terminal hangs and print out rubbish
2) Using http Administrator ->Console setting ( i cannot find the link with console setting)
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Nov 15, 2011
I have a question if I Stack a Catalyst 3750 L3 with a Catalyst just L2, will we able to use all L3 capabilities?
Switches are
WS-C3750G-24TS-E1U
WS-C3750V2-24PS-S
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