Cisco Switching/Routing :: 3750 - Unable To Paste Script Into Terminal Session
Feb 28, 2012
I have 100+ 3750's that are running various IOS, some stacked and some not, and all seem to have the same problem.If I attempt to paste a configuration into the terminal session I get booted after about 10 to 15 lines. This happens when using SSH and Telnet. Telnet will go a little further before I'm booted. After I'm booted it sometimes takes a minute before I can log back into the switch. Any issues pasting configs into a 3750 via a VTY session?
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Feb 7, 2012
The network is set up like this.
Host -----> 3750 (classic) running IPSERVICES stack ----> 3550 router -----> VPN 3005 Concentrator.
IP routing is disabled on the 3750 (it's acting solely as a switch) IP routing is enabled with an EIGRP process running on the 3550 router that has the network for the 3005 broadcasting.
I can ping the vpn 3005 concentrator from a telnet session in the 3550 but not from the 3750.I can ping between the 3750 and the 3550 vlan management interfaces. Visually speaking it's like this
3750 ------> 3550 [Success!!!!]
3550 ------> VPN 3005 Concentrator [Success!!!!]
3750 ------> 3550 --xxxx--> VPN 3005 Concentrator [Timeout....]
I know this because I tracerout to the 3005 from the 3750 and it resolved the default gateway configured for the 3550 properly but then started timing out.
The 3750 is trunked to the 3550.
3750 is vtp client mode
3550 is vtp server mode
I'm wondering if there's a layer 2 issue involved here as it is a VTP domain and maybe it's not returning properly.
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Aug 20, 2012
i have just set up a monitor session with a 3750 stack .Simple enough task you would think.But i only seem to be seeing broadcast packets !!Now there is definitely unicast traffic being used on the host i am monitoring.I have done the basic commands
-monitor session 1 dest int fas 5/0/24
-monitor session 1 src int fas 5/0/34
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Oct 23, 2012
I have a set-up with multiple C2960 and C3750 switches. All these devices are being managed remotely. So basically I login to C2901, which is used as a Terminal Server, and reverse SSH to the console of each device. That's - I have assigned an IP to each port of the terminal server so that I can SSH directly to the desired device through via the mapped IP.
Now, recently I had to restart couple of switches - one C2960 and C3750. I initiated the reboot via console connection remotely. I could see the device logs for some time and then the logs stopped and there was no reaction from the console irrespective of any command I tried to enter.
I tried resetting the line on the terminal server, but that didn't work.
Now when I try to SSH the IP mapped to console of that particular device - i dont get any login prompt and there is no effect on device after giving any command. Although i can see the logs on the console session - but cant do anything.
I have a second way of connecting the device via inband- management, and checked the device config found it correct. It is same as other devices which are working correctly.
Both C3750 and C2960 are behaving exactly same - can see logs on console but see effect of even pressing enter - not getting login prompt as well.
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Mar 6, 2013
I tried to clear monitor session on 6500 and keep on getting the following error:
%Another session parameters or permit-list is being configured %Please wait for another configuration to complete.
how i can go about clearing the monitor session.
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Jun 2, 2012
What command sequence disconnects you from a TS session? My setup is as followsr1 > TS > 2009-2621XM 2010-3825-R1 2011-3825-R2I can connect from the TS to any of the devices. The issue is that I am telnet'd to r1 and from there telnet'd to the TS. So when I type "Crtl+Shft+6, x" I go directly back to r1 and not the TS. Furthermore if I resume the session on r1 the TS is still connected to whatever session I was in prior to disconnecting. I've experimented with the disconnect and escape characters but I'm at a loss what it is that changes this.
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Aug 15, 2011
Our company has installed ACS Version: 5.1.0.44.6 Internal Build ID: B.2347 with patches: 5-1-0-44-5, 5-1-0-44-6. The security policy of our company includes a password change every 3 months. Our programmers had written a script that allows us to do it. When testing revealed that the script does not work. This is due to the fact that it is not possible to enter the mode "acs-config". In determining the reasons it was found that to enter this mode there is a limit on sessions (6 sessions). When the number of connections becomes larger than 6 then the script does not work. The documentation says that the update is not active sessions is set with terminal session-timeout. In this case, the terminal session-timeout 30. But after 30 minutes of the session will remain active. It interferes with our script.
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Jun 11, 2013
We created some local account for this switch but we unable to login when the TACACS Server down.
3750 Switch
aaa group server tacacs+ ACS
server x.x.x.x
server x.x.x.x
ip vrf forwarding Mgmt
ip tacacs source-interface GigabitEthernet0
[code]....
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Apr 22, 2012
Here is my configuration below , i have upgraded my C-3750 switch IOS from IPbase to IPservices , after upgrading i have tried to apply PBR on my Vlan 4 and failed , when i am tying to apply route-map to Vlan4 the command was taking but i am unable to see the route-map when sh run , i am giving the command as "ip policy route-map TTSL" in my Vlan4 , below is the configuration.
In Vlan2 i have connected one ISP and Vlan4 I have connected one ISP , my local subnets are 192.168.1.x and 192.168.2.x , now i want to route the 192.168.1.x traffic from Vlan2 and 192.168.2.x Traffic from Vlan4 .
sh boot
coreswitch#sh boot
BOOT path-list : flash:c3750-ipservices-mz.122-35.SE5/c3750-ipservices-mz.122-35.SE5.bin
[Code].....
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Nov 18, 2012
I am runing 802.1x and MAB authentication of devices connected to a 3560 switch (in test). When I run 'terminal monitor' I am getting alot of authentication fail-msg. Is it possible to get the switch not to show them? I have to do some debugging on SNMP and DHCP to be able to figure out why I get these msg, but since the switch is blasting out so many auth-msg it is hard to see the debug messages. [code]
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Apr 22, 2012
I have a switch(6500) with 2 vlans(2 SUBNETS) and from the other side of my network i have 2 terminal servers.
I want to have a VIP in my 6500 switch which i have the 2 vlans and when the first vlan(network) try to connect to the VIP
my switch will forward to first terminal.When the second vlan try to connect to VIP the switch will forward to second terminal.
I'd like the switch to decide in wich terminal server will forwared the packet based on source network.
I am not sure how i can do this???I use VIP with SLB???I use NAT???PBR?
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Nov 11, 2012
is it possible, to use a Catalyst Switch (in my case a 3560E) as a source for a console session to another Catalyst? In principle to use it as a console terminal server.
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Jul 23, 2012
I have a 2611XM that I am using as a terminal server for my lab setup. Async is using octal cables. It works great with routers of all different models, but when I connect a switch of any model, it does not work. The connectivity LEDs don't even light (they do for the routers). The switches in question are 3750s and 3560s.
I have tried straight through from the octal cable to the console port of the switch, as well as a rollover with a converter, no luck. This does seem to be independent of configuration on the console port - even before the console port of the routers were properly configured, I at least had indication of physical connectivity.
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Feb 16, 2012
So I have read about proper procedure involving the connection between a console cable and Hyper-terminal. I have also tried plugging into a network port to obtain an IP Address but nothing seems to work. When powering on the switch I see that it lights up, hear fans spin and assume it has booted properly. I'm using Hyperterminal on Windows Xp Pro SP3 and I've also tried minicom in Fedora.
And just FYI Hyperterminal was set to the proper:
Bits per second: 38400
Data bits: 8
Parity: None
Stop Bits: 1
Flow Control: None
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Aug 30, 2012
I will use function of span in sup70-3b.How many session can use in sup720-3b? For example, 2 or 4 session.
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Oct 29, 2012
I don't get whats the problem but when i try to run the following command :
sudo apt-get update
I was getting an output of sort...
0% [Connecting to us.archive.ubuntu.com (91.189.91.13)] [Connecting to security.ubuntu.com (91.189.92.184)]
0% [Connecting to us.archive.ubuntu.com (91.189.91.13)] [Connecting to
[Code]....
And our institute uses a proxy server... when i try to ping that server it was pinging these servers but not the external servers...like security.ubuntu.com or some other site... I can access internet from my browser, but the software center is unable to download anything.
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Jul 12, 2012
I have a need to capture some traffic but my core 6513's are already using the limit of 2 span sessions. I can't edit any of the sessions either because I want to source traffic from vlans and you can only do one or the other. Is using a VACL with 'switchport capture' on the destination interface an option ? E.g. I want to source traffic from vlan 10,20,30,40 and send the all to interface Gi10/10 ? Is there any caveats ? I dont need to be too granular with the ACL's but just capture all traffic in those vlans.
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Apr 20, 2012
I am having trouble with my Cisco SG300 switch big time. I have two servers with IP addresses 10.17.0.11 and 10.17.0.29 sitting on the same switch which is a Cisco SG300. I initiate a file transfer from 10.17.0.11 to 10.17.0.29. I could see lots of Dup Acks and retransmissions which means something is wrong in the connection. Further, I could see the session initiation a bit bizarre. I could see two SYN packets sent from 10.17.0.11 to 10.17.0.29 and also two SYN ACK packets returned by 10.17.0.29. The switch forms part of a network but since both the servers are sitting on the same switch I suppose the rest of the network doesn't come into play when one server talks to the other.
See also the number of Dup Acks and retransmissions. The two switch ports connecting the servers have speed and duplex set to auto negotiate, flow control is enabled. What could cause this sort of problem?Could it be any setting on the switch or the servers' NICs?Or could it be a bad switch that causes this?
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Oct 18, 2012
I've noticed that when using the range command to configure multiple interfaces on a 3750 the SSH session oftens hangs. It's seems the more interfaces in the range command the more often it hangs. I have a feeling it also spikes up the CPU. Doesn't seem to be related to a specific version of code.
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Nov 2, 2011
I am seeing the following behavior when computers move from one switch to another with dot1x ONLY when there is a 'stupid' switch in between.
computer -------- 'stupid' switch ------- 2960
dot1x is working fine but when the computer is disconnected, the port still shows the authentication session id so when the computer connects to another port or switch, authentication succeeds but traffic doesn't pass. While I'm almost certain that the culprit is the 'stupid' switch that doesn't clear the session id, I have already tried another one and the problem remains so I'm actually just asking for a confirmation that all these 'stupid' switches present this behavior and if there is a workaround in this case.
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May 17, 2012
I'm dealing with a 4506 switch that whn I try to apply "sh auth sess int xx" I get "Invalid Input Detected" ... Is there any way that I can get the authenticated session over a port even if I can't apply "sh auth sess int"?
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Jun 9, 2013
I'm setting up a montitor session on a NEXUS 7K as below.we are receiving in 150M of data and 0 data going out port 9/25.but port 4/24 shows 300M to the span port?
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Jun 9, 2012
On 2921, how do you quite service-module session and get back to the router?
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Nov 21, 2011
I tried to clear monitor session on 6500 and keep on getting the following error:
%Another session parameters or permit-list is being configured %Please wait for another configuration to complete.
how i can go about clearing the monitor session.
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Mar 3, 2013
rsbd7k01-p-vdca(config)# monitor session 2
rsbd7k01-p-vdca(config-monitor)# source vlan ?
<1-3967>
rsbd7k01-p-vdca(config-monitor)# source vlan 1 - 3967
ERROR: vlan 33-3967: Number of source vlans exceeds maximum
rsbd7k01-p-vdca(config-monitor)#
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Jun 30, 2012
Do I need the Universal image to perform stftp on a 3750 or 3750-X?
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Apr 9, 2013
we are facing issue for unstability of EIGRP neighbor with ISP router.Both router are connected via 3750 switch.There is no misconfiguration or physical media issue.I found the SDM template on the middle switch is desktop default, does this will impact ? [code]
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Dec 29, 2011
I console into switch 1 (or router, it doesn't matter) and everything is fine. From that session I SSH to switch 2 (or router). The session on the second device has a noticable delay when I type.Next I SSH to switch 1, then SSH to switch 2 from that session. Everything works fine.Finally, I console to switch 1, and telnet to switch 2. There is no delay.So it appears the delay only occurs when I open an SSH session while consoled into a device. It didn't matter what switch 1 and switch 2 were - I had 3560Gs, 4900Ms and a 3845 router. There's no special configuration on the console or vty ports - when I do a "show line console" and "show line vty 0" the output is basically the same.
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Jun 6, 2012
Need to confirm if this is default behaviour of 4507 with 2 supes.When i console in to standby supe gives message console session is disabled?
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Jan 9, 2012
I have a switch 4948, with version 12.2.31.sga4 ( I dont found bug about monitor session) and we try to made port mirroring with a monitor session from a VLAN and port belong at this VLAN have traffic input and output, but in the destination port, I always see it output traffic..
Global command
Red-127#sh run | in moni
monitor session 1 source vlan 1127
[Code].....
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May 9, 2012
we want to record voip telephone?Presently im using wireshark on a laptop to test the rspan session
Here is how it's configured
CORE_SWITCH is
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 28 WS-C3750G-24TS 12.2(52)SE C3750-IPBASEK9-M
2 52 WS-C3750G-48TS 12.2(52)SE C3750-IPBASEK9-M
[code]....
Ive created the vlan 33 on my core switch and remote SPAN VLANs 133 Core switch is vtp server so i double checked on all switch and vlan 33 and 133 are present When i listen to conversation with wireshark we are only recoding voice of the one who is answering and we don't hear the other person talking?
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Jan 31, 2012
On a Catalyst 6500, we configured a SPAN session with VLAN 300 as a source. We configured the session bi-directional ("both" keyword). We connect a sniffer on the SPAN destination port.
Strangely enough, we only see the traffic from the VRF to the firewall, but not the reverse traffic ! What can be the problem ?
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Feb 27, 2013
Any issues with pasting scripts into a Nexus 7K and having the scripts get all messed up even though they are logically correct? I've had this issue over the years with IOS devices and the console port and tweaking some of the line feed/character delays fixes the issue but that was always with the console port and not a telnet session. Telnet has always worked flawlessly on IOS.
I've determined that if I tweak my line feed delay up to 1000ms it seems to work fine, but it just doesn't make sense to me that I have to do that.I have a customer with 3300 ACL lines that need to be put into a Nexus as part of a migration from 6500 to Nexus. And yes, I've already tried to convice them to offload these VLANs behind an ASA!
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