Cisco Switching/Routing :: Unable To Connect To Switch Over A Cat5 On First Port
May 7, 2012
Im not going to lie, I'm pretty much a beginner when it comes to switches. I have recently purchased a second hand 3512 XL which I have managed to connect to via PuTTY and the console cable. I have familiarized myself with access privileges and resetting passwords and locating the IP address, etc.
I am trying to connect the switch to Cisco Network Assistant however I am unable to connect to the switch over a cat5 on the first port (nothing else is on the network, just a server directly to the switch). I have tried pinging the switch from my server, and similarly I have tried pinging the server from the switch and each time there is 100% fail rate.
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Sep 21, 2012
I have a problem with extending the LAN on a client site . They are looking to extend the LAN with a 2960S-series switch. Already in place is a 4510 switch which the 2960 is connected to via fibre. The 2 switches are both set up but there is no connectivity as I cant ping between them or anything. The management VLAN on the 2960 shows line up, protocol down, which I believe means the VLAN is enabled but there is a form of physical mismtach on the ports. I have attached the configs of both switches. I feel it might be a problem with GBIC module compatibility. The SFP installed on both ends of the switch are GLC-SX-MMD. On the 4510, the SFP sits in a twingig converter (CVR-X2-SFP) but there is no light on it at all when the cables are plugged in.
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Jul 27, 2012
I want to expand my network with this switch. I have a cable from a DSL router directly connected with a network device. Now I want to connect first from my DSL router with the switch and then from the switch to the network device. But which port of the switch to connect with the router?
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May 19, 2013
I am unable to connect a Wifi Modem wiith 2960 Switch having VLAN 1,Attached is the network diagram,what configurations i have to modified it,I need to Connect A Wifi Modem on VLAN 1 ,Connectivity is working fine between VLAN 10 and VLAN 1.What should be the next step to Connect Wifi Modem to VLAN 1 so that Users on VLAN 10 should connect to Internet.
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Nov 12, 2011
Why I cannot ping vlan when no port connect to switch.
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May 8, 2012
On the supervisor card of a cisco 6500 series, according to the following link, [URL] it only has 2 uplink ports on the card. Would I be correct in assuming that I only have those to ports that I can configure IP addresses on?
The cisco that is being devlivere is coming with a 48 port switch and 24 port fibre switch. Could I change any of those ports into a router port and configure IP addresses on those?
The supervisor card is a ws-sup-720-3b the 48 port switch is a ws-x6748-ge-tx the 24 port fibre switch is ws-x6724-sfp
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Jun 5, 2013
I'm fairly new to Cisco products am in the process of developing my network knowledge on a deeper level. I have a 3825 with a HWIC-4ESW and I'm struggling to fully understand how the two "see" each other. I've setup a V LAN with a layer 3 address on the HWIC and added the switch ports to it. This seemed to allow devices connected to the switch ports to talk to the built-in router ports. I thought this was all making sense until i applied an access-list to the router port. It's a simple ACL i'm just using for testing and the only thing it does is blocks telnet from anywhere. I know the ACL is setup properly because if I connect a device directly to the router port i cannot telnet to the port. However, if i connect a device to one of the switch ports, i am able to telnet to the router port successfully.
It seems that I'm missing something with how traffic flows from the switch port to the router ports and how the two "see" each other.
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Dec 28, 2008
what is the use of no switch port command in L3 switch?
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Feb 26, 2012
I was looking for a way to connect an AUX port from a 1700 router to a 6500 switch module console port, to see the output of the Switch's on the 1700 router, in case there is a network downtime, I could see what's going on in the switch, what cable should I use ? Also, is there is any kind of documentation for this type of config what have I seen is very few info.
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Aug 28, 2012
I have a 6509-E chassis that was prevoius in a VSS configuration. Due to some VSL failures I had to cobvert it to a standalone chassis but would like to bring it back to a virtual system.
Whenever I try to convert it by using the command "switch convert mode virtual" I get the msg %Please configure local switch number first". After doing so by entering the CLI cmd "switch set switch_num 1 local" I still get the same message.
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Jun 8, 2013
I have inhereted a network in a school that is using a Cisco Catalyst 500 series switch. Previously, it appears that this switch was never managed (just plugged in and using it's default configuration). I am trying to change that and be able to control the switch using the Network Assistant or just the web-based device manager. I understand that you cannot perform the initial configuration with anything past Windows XP, because the broadcast flag setting past XP causes an issue where the IP address of the management computer is assigned but not the default gateway. Despite this, I am still unable to connect to the switch for management purposes. Here is a list of the steps I have taken, all of which have been unsuccessful:
1) I tried using a computer running Windows XP. The same issue occurred. It was assigned an IP address from the switch but did not get a default gateway. It was unable to access what should have been the default IP of the switch; 169.254.0.1
2) I tried it in Windows Vista by editing the registry to turn broadcasting off. It still did not work.
3) I tried it in Windows 7. Still no luck.
4) In all 3 operating systems, I tried using the "Advanced" setting in the TCP/IP configuration to add a default gateway of 169.254.0.1 to no avail.
[URL]
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Oct 30, 2011
I have configured a new switch 3560 switch and connected to 4500 switch and formed a trunk connectivity.Now the issue i am facing is when i do a SH CDP NEIGHBOUR from 3560 switch i am able so see 4500 swries switch but at the same time when i do SH CDP NEIGHBOUR form 4500 series switch i am not able to see the entry for 3560 switch.But i am able to telnet the new switch with out any issues
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Jul 16, 2012
Is it possible to use the inbuilt 4 port switch on a Cisco 887VA ADSL router for inter Vlan routing? My plan is to configure port FA0 - 2 as Vlan 1 (default) 192.168.0.254/24 and port FA3 as Vlan 2 192.168.4.254/30. My SIP server will sit on Vlan 2 192.168.4.253/30 however remote Wan users coming through other Cisco 888 routers connected to the 887 will need to access Vlan 2 from Vlan 1, is this possible?
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Apr 15, 2012
There 's a Cisco IP phone that sits between a PC and the switch port. On the switch port, no MAC address is learned. However, the switch is able to detect the IP phone and deliver power to it: [code] Switch is Catalyst 3750 with IOS version 12.2(58)SE1.
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Nov 25, 2012
I have a C6509 with WS-X6548-GE-TX port module. The first port group, 1-8, is showing oversubscription (packets dropping) in the shared buffer. What interface commands can I use to find the specific port causing the buffer overflow?None of the ports is continuously overutilized and none of them in a SPAN destination group.I don't want to move connections without knowing which one is causing the problem. Also I fear that moving the connections may shift the bleeding to another shared port group.
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Mar 2, 2012
If I knew the IP address of a host, can we know on which port on the switch its connected. The switch model is 2960
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Sep 8, 2010
configure port security Cisco 500 Swich ? There is no CLI mode in this switch?
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Feb 7, 2011
I have a stack with a lot of stack-port changes, but on all the ports, how can I determine the faulty switch in the stack, cables are already verified. We did also a restart of the whole stack power off/on
running version
WS-C3750-48P 12.2(55)SE C3750-IPBASEK9-M
This is the output after 6weeks
Switch#/ Stack Neighbor Cable Link Link Sync # In Port# Port Length OK Active OK Changes Loopback Status To LinkOK -------- ------ -------- -------- ---- ------ ---- --------- -------- 1/1 OK 4 1
[Code].....
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Oct 19, 2012
I have a small lab setup and I am trying to implement an IDS/IPS on the network. I have 3 VLANs setup (10, 20, and 30) with the switch and a router allowing for inter-vlan communication. Port FA 0/1 on the switch is setup as a trunk using 802.1Q connected to a single interface on the router.
I want to be able to monitor traffic on the trunk link on the switch and replicate that to the IDS/IPS host. Is there a way I can mirror traffic from FA 0/1 (the trunk link) to a regular access port on the switch which would connect to the IDS/IPS?
I have seen several articles on Cisco.com saying that you can have a source port as a multi-vlan link, but others say it is not possible. I did not have a chance to get into the lab to test this yet or else I would have.
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Jun 17, 2012
I implemented the 3560E switch, this one have two Giga bit ethernet/10-Gigabit Ethernet module slots. I used the Twin Gig Converter Modules and one SFP. All configuration was applied in the Ten Giga bit, however the interface giga bit ethernet is UP UP state and the Ten giga down down.
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Dec 19, 2012
We have an old 3508XL switch. We are trying to connect a new 2960 to it but we purchased the incorrect SFP insert and that speed can only do 100mb. We are getting link flaps and we suspect that it's a speed issue between the two. However, I cannot find how to set the speed on the old OS of the 3508 switch.
Below is a show version of the 3508 switch.
LR0007>show ver
Cisco Internetwork Operating System Software
IOS (tm) C3500XL Software (C3500XL-C3H2S-M), Version 12.0(5)WC17, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by cisco Systems, Inc.
Compiled Tue 13-Feb-07 15:04 by antonino
[code]....
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Nov 9, 2012
Unable to access switch from outside the local network. Can get to all routers and PC's
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Nov 1, 2012
I am having 2960 switch and one port is configured with a VLAN and connected with an unmanageable switch and further one more unmanageable switch was connected to the primary unmanageable switch…
The topology will be 2960 switch -> unmanageable Switch -> unmanageable -> PC connected
The issue I am facing most of the PC are getting IP addresses through DHCP server and very few 5 or 6 PC’s out are not getting the IP from DHCP server.If I switch of the switch and switch on the issue is resolved for those and it will raise for some other PC’s.
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Dec 27, 2012
I have 2960 switch and i can't access it using my console cable .I can access other switches in my network ( 3560 & 2960 ) but i can't access only this switch.may be the console port in the switch damaged? or it's a bug ?? !!! although the switch is worked normally.
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May 1, 2013
i have a device connected to 2960 switch. It is an access port and i could ping the device from other switches , also from outside the lan. But i am not able to ping the device from 2960 switch alone. I suspected and checked the arp table and it was showing as incomplete. I created the manual arp entry and tried pinging but no luck.
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Mar 30, 2013
i am not able to add new 3750G switch into existing domain even after the domain name is correct and unable to authenticate with tacacs.
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May 8, 2013
I am trying to configure port-channel from one switch to two switchs, and only one interface of each switches make part of the port channel.Cisco IOS Software, ME380x Software (ME380x-UNIVERSALK9-M), Version 12.2(52)EY4, RELEASE SOFTWARE (fc1) [code]
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Jan 24, 2012
While working at a client site today, I was troubleshooting some ICMP connectivity for a network we have created.I turned on 'debug ip icmp" on the 3550 switch int he middle, and was inundated with the following debug output:
Jan 25 11:01:14.641: ICMP: dst (172.16.1.7) port unreachable rcv from 172.16.1.5
Jan 25 11:01:14.641: ICMP: dst (172.16.1.7) port unreachable rcv from 172.16.1.5
Jan 25 11:01:14.641: ICMP: dst (172.16.1.7) port unreachable rcv from 172.16.1.5
Jan 25 11:01:14.641: ICMP: dst (172.16.1.7) port unreachable rcv from 172.16.1.5
[code]....
This output fires several times a second, and based on how often it is firing, I am curious if it may be a culprit with respect to the fact that the client has indicated that they have some slow internet.Should the next step be to look at the workstation at 172.16.1.5?
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Dec 20, 2011
I have a Cisco 1941 K9 Router. I want to add POE functionaltiy to it. Specifically I want a 4 port EHWIC POE switch to power a couple of AP's.
This is what I understand I need; Upgrade/replace the internal power supply with PWR-1941-POE power supply, This is supplied with a fan replacement also (not yet purchased).buy 1 x EHWIC-4ESG (4 port switch)buy 1 x ILPM-4 (inline daughter card / power supply board) I think the real question here is the 4 port switch... there are two types available one is EHWIC-4ESG=the other is EHWIC-4ESG-P=
Is there any difference between these two switch modules? or are they the same and the more expensive "P" version is simply supplied with the ILPM-4 daughter card for POE?
I have recieved via courier today 1 x EHWIC-4ESG, and found a ILPM-4 on ebay for a good price. WIll this provide POE through the switch EHWIC-4ESG?
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Jun 20, 2012
I have a Cisco 2960G switch and one of the ports was configured with srr-queue bandwidth limit 90 - I need to remove this bandwidth limiting from this interface. [code]
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Nov 6, 2012
I have a 3750 catlyst switch in my network and it is like a distubation switch,And for the nating and dhcp nomadix is using as gateway in the same network. for one of my local PC i need to config the port forwarding in 3750 switch. How to config the port forwarding on 3750 switch,
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Nov 8, 2011
I'm trying to setup a port on a catalyst 3750 so it will pass traffic for 2 vlans. It connects to a (watchguard) firewall which I've configured with a primary IP (for vlan 27) and a secondary IP (for vlan 29).
However I can't seem to find the correct commands to enter on the cisco switch port (I've tried a variety).
FYI the current configuration is...
interface FastEthernet1/0/38
description ## Connection to WG vlan27 and vlan 29 ##
switchport trunk encapsulation dot1q
[Code].....
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Oct 7, 2012
We have QoS configured throughout the company, but the standard config we have applied across the 3750 switches only includes the below: We have IP phones (not cisco) attached that are marking with EF, and the PC is an untrusted end device (so needs to be by default marked as zero).Is the above enough to trust VOIP DSCP EF without resetting it to DSCP 0, or do I also need to add a trust line (i.e.: mls qos trust dscp)?
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