Questions tagged [cisco-catalyst]

A tag for questions related to Cisco's Catalyst line of switches.

Filter by
Sorted by
Tagged with
6
votes
2answers
9k views

Should I disable STP on my access ports?

I'm going to replace some old "central" access switches to some Cisco Catalyst 2960X, and I'm not sure what to do on their STP configurations. For this network, we have some "central" access switches,...
1
vote
1answer
5k views

Access-list won't show all hit matches

I have access-lists in place. When i use the show ip access-list command, some of access-lists show counters (hit counts), and some don't. If I change the rule from permit to deny, interesting traffic ...
1
vote
1answer
1k views

Which system image should I choose to upgrade my Cisco switch? It has to be a cryptographic image

I have a task to upgrade Cisco switch with a cryptographic image. However, I can't figure out with one I can choose from the list that I have available to me. Please advice. Here is my current switch ...
1
vote
2answers
565 views

Cisco LLDP config question

I am following the guide that is listed here for enabling LLDP on my Cisco Catalyst 3560G switch. In short I entered the following into my switch. Switch# configure terminal Switch(config)# lldp run ...
2
votes
1answer
4k views

How to configue email notifications alert on cisco prime infrastructure 3.0

Well, I'm trying to configure email notifications alert on our Cisco Prime Infrastructure v.3.0, so that I´ll be able to receive email alerts, for instance, when any interface, devices like router, ...
1
vote
1answer
912 views

Cisco, No dot1q tunnel mode on switchport

The problem is: I can not find a QinQ(a.k.a. double vlan tagging or dot1q tunnel) feature in the following cisco switch: WS-C4510R+E, SUP8-E with WS-X4748-UPOE+E line card installed. The Cisco ...
2
votes
2answers
1k views

How do I enable port security on Cisco switch?

I have a Cisco switch model 3500 series 48 port. I need to enable port security on this switch. Could you tell me the configuration commands to apply this policy?
1
vote
1answer
5k views

RADIUS test works but actual logon fails

Let me start by putting my issue into one sentence: I have a Catalyst 4507 and I can't log onto it using RADIUS even though the configuration is the same as a Catalyst 3850 which is working and ...
1
vote
4answers
3k views

Configuring 2 layer 3 switch with VLAN

I am trying to create 2 vlans- 10 and 20 where 10 is for user and 20 is for DMZ. vlan 30 created is to link between vlans 10 and 20. Right now I'm only able to ping user from vlan to their switch and ...
3
votes
1answer
633 views

Isolating ports on a Cisco Catalyst 2960-X Switch

I'm a bit of a newbie when it comes to networking, so excuse my ignorance for asking this. I did try to post this on the Cisco support forums, but kept getting told it was spam haha, so I hope this is ...
1
vote
1answer
275 views

Is it possible to use a interface of Catalyst on a ISR

We use Cisco Catalyst 3850 Switch (with Cisco One Foundation) as aggregation Switch for multiple Lines and connect it to a ISR 4451 for routing. Now we search for a solution to use the Interfaces of ...
1
vote
1answer
517 views

No Private VLAN commands Cisco C3560 switch

I'm studying Private VLAN on C3560 Cisco Switch hardware. When i enter the (config-vlan)# It doesn't contain the private-vlan command in the list of available commands. I turned the VTP mode to ...
1
vote
1answer
1k views

Routing issues, can ping core switch but not firewall

We have a setup with 4 total sites all connected back to one, 2 via fiber and one via a wireless link. The link with the wireless bridge also needs a vlan (269) from our main site, so we set it up as ...
0
votes
3answers
1k views

Power usage of ports of the Switch

I have doubt regarding the swicthes of network.I want to know the power usage of the switches by changing the active number of ports. If I change the egress traffic ports(like port2 port3 etc.,)by ...
2
votes
1answer
538 views

How to upgrade or flash IOS on Cisco 4503E without flash?

I am trying to restore Cisco catalyst 4503E switch. When I turn on it I enter rommon mode? How to restore or fix this problem ? Unfortunately, I haven't a flash card. Here is my screeenshots:
1
vote
3answers
221 views

Cisco Switching Lab

Could you please advise with some ideas on how to setup a Switching lab in a production enviroment without harming the Production ? Basically I need 3 Cisco Switches where I can try some labs but ...
4
votes
1answer
2k views

Cisco Catalyst 2960 X MAC access list

I am using a MAC access list on this switch, so I go about it by first creating the MAC access list: #conf t #mac access-list extended aclname # permit host XXXX.XXXX.XXXX any Then, I tie this list ...
3
votes
1answer
2k views

Locked myself out of my Cisco switch

I have officially made the dumbest mistake ever. My switch is a Catalyst 2960 Series, configured this way: Current configuration : 10052 bytes ! ! Last configuration change at 19:15:28 UTC Wed Oct ...
0
votes
1answer
1k views

Spoof MAC address of VLAN interface on IOS

Is there a way to change the MAC address of VLAN interfaces (switched virtual interfaces) on IOS? I would like to configure the MAC address of a Catalyst switch. Because all VLAN interfaces derive ...
2
votes
2answers
1k views

Command for showing unused ports over time on Cisco switches

I was looking at a previous question about this where a command was given to look for all ports that had not been used in 6 weeks. I ran the command but it doesn't give the port names just the line ...
2
votes
1answer
720 views

Problem with trunk between Cisco ASA 5505 and Catalyst 3750G

I'm trying to make a trunk between a Cisco ASA 5505 with the IP Service licence and a Cisco Catalyst 3750G. Here are my current config's: ASA: interface Ethernet0/1 switchport trunk allowed vlan ...
11
votes
2answers
2k views

How did I break (half of) my network?

I'm looking for some post-event advice so this event doesn't happen again. We have a network core of two Cisco 4500x switches, configured for VSS redundancy. From those, we have iSCSI devices, our ...
1
vote
0answers
758 views

Issues with port forwarding with Layer 3 switch [closed]

Since I have upgrade my switch, I have been experiencing issues with port forwarding on my pfSense gateway. I have done some researching on google, but didn't come to any conclusive results. ...
2
votes
2answers
265 views

Cisco CoreSwitch 6509 Vlan connection problems

just wanted to ask what measures I'll have to do regarding on my problem on CoreSwitch 6509. I have 12 vlans on layer 3 switch which has 48 ports, 4 ports per vlan and I have a backbone on vlan 10 and ...
1
vote
2answers
8k views

Switch 3550 password default password

What is the Cisco 3550 default password? I lose the password due some power outage while I was programming. I did reboot, and try the recovery password but doesnt work.
2
votes
2answers
129 views

Cisco 3570x stack behaviour

Could you please advise on following: We have two Cisco 3570x switches in a stack (switches have no Stack Power). What will be the behavior if: Master switch will be powered off. Will Slave reboot ...
1
vote
1answer
737 views

VTP Mode Automatically Changing to Server

Really hoping you can help me shed some light on some serious issues I've been experiencing on our production network. I'll give a quick background and explain the issue. Background: Our network ...
0
votes
1answer
2k views

Is there a way to automatically have unused ports disable?

Like many others I can see how to display ports that have no traffic flowing through them and go through and disable them but we have hundreds of cisco switches. I like the idea of being able to see ...
2
votes
2answers
8k views

what are input errors on the CISCO switch?

In my topology, I have connected spirent - traffic generator to MRV switch ( L1 switch) and then connected to CISCO switch. I am seeing some input errors on this interface. What does it mean? Does it ...
3
votes
3answers
3k views

Operational mode is down for one link

I am setting up a simulated Cisco Packet Tracer with three Cisco Catalyst 2960 switches S1, S2 and S3. S1 being the trunk for S2 and S3. I have three(3) interfaces F0/6, F0/11, F0/18 that are ...
1
vote
1answer
3k views

Unable to connect to cisco 2960 switch through the default gateway

I apologize if this is an easy fix, but I just got a used 2960 series S switch and am unable to connect to it through the default gateway. I am using a straight-through, RJ-45 connector ethernet cable ...
1
vote
1answer
2k views

IPTV Cisco configuration for C2960

I have attached a network diagram explaining IPTV network , i have below queries to understand & configure IPTV . All ports on edge switches are configured as access ports in VLAN 101. On Core &...
1
vote
3answers
8k views

Cisco 3750 switch stack with different IOS images

There is a situation here, I am trying to add a new switch to an exisiting stack and i found out that the switch image in my current stack and the new switch is different. Can i still go ahead and add ...
2
votes
2answers
3k views

One of a switch in a stack is frozen

I have a stack of 3750 switches, which have 5 switches in it. One of the switches (switch 4) in the stack is frozen. The way I can tell is because all the lights on the switch are turned on, and I ...
2
votes
4answers
870 views

Configuring Ports on a Cisco Switch

I am very new to Cisco networking (haven't done any course either). I have been trying to learn a bit of networking myself and had no trouble in doing some of the basic stuff which i needed for my ...
1
vote
2answers
522 views

Cisco 2960-X IP Address

I want to access my 2960-X on my "server-network". I have configured a network 10.0.0.0/24 (VLAN60) on the Router, which is connected to the switch over a trunkport. Also VLAN 40, 80, 90 is ...
8
votes
2answers
2k views

Basic Catalyst 3560 Egress Shaping

We have a service provider (and we can't change providers) who is giving us a "metro ethernet" style connection between two of our locations. On each end, we plug into an ethernet port on a provider's ...
2
votes
3answers
215 views

Building Spanning-tree link

I have two 3560 switches, and I have 2 uplinks. The goal is to make one link green on both ports on each switch, and the other link amber (standby), so when I pull the active green link out, the other ...
3
votes
2answers
776 views

Alternative to Cisco APIC-EM for small lab

Are there any alternatives to meet a small auto provisioning server for a Cisco switch (Cat3850)? I'm working to setting up a "plug and play" capable Cisco switch (Cat3850) in small isolated lab. I ...
1
vote
0answers
633 views

Packets are disappearing

I have a server HP DL180 G6, connected to a Cisco switch (4948E or 2960). The server have 2 ethernet ports and ILO shared with data port #1. ILO setted up to request ip from DHCP. 1) When I connect a ...
1
vote
1answer
523 views

how to extract ios firmware from catalyst 3560 v2

i accidentally formatted my client cisco catalyst 3560 v2 24 ps. Now no firmware inside. Lucky i got another same switch for standby. my question here, how to backup firmware from standby switch to my ...
3
votes
3answers
6k views

Cisco 3750 configuration for static routes per VLAN

I have a router that has 4 VLANs configured, with an interface on each VLAN, the router serves as a gateway and provides internet access. VLAN | Interface | Function --------------------------...
1
vote
3answers
21k views

Can't SSH and Telnet my Switch [closed]

I just realized one of my switches are not reachable by SSH and even Telnet. I just noticed that of recent, and I don't know what could be the problem. This Switch is in a large network, and we ...
1
vote
3answers
4k views

Assign IP address to a FastEthernet port on CPT switch

I've configured a vlan 3 with ip address and then assigned FE port to vlan 3 , i read that this will assign the ip address to the FE interface. I know this is really simple configuration .But really ...
1
vote
2answers
443 views

Network distribution/core design implementation

Can the Cisco 3650 do the job of distribution/core layer? We have at least 250 devices that will be connected to the network. More info : The Cisco 3650 is needed for inter-vlan routing.
1
vote
1answer
906 views

Mirroring Ports on a Cisco 3750 Stack

We have a stack of 6, 48 port 3750 cisco switches and I would like to setup mirroring across the stack to send the data to a network analyser. I have done mirroring before on a single switch, but ...
0
votes
3answers
227 views

Read out down time of switch port

Is it possible to read out the time a switch port has been in down state on Cisco switches e.g. 2960x. Br Frank
1
vote
1answer
931 views

Recommended Cisco storm-control broadcast and multicast threshold value for user PC

What is the recommended storm-control threshold value of broadcast and multicast on Cisco IOS catalyst switches for ports connected to users?
4
votes
1answer
2k views

"debug" to show vlan of incoming frames

At a remote site where I can't easily set up SPAN and do a regular packet capture, I need to see the VLAN of incoming frames on a trunk interface. Is there a debug command for a Cisco Catalyst 3560X ...
2
votes
1answer
706 views

Why would you use port security mode “protect?”

Port security offers three violation mode options: • protect—Drops packets with unknown source addresses until you remove a sufficient number of secure MAC addresses to drop below the maximum value....

1 2 3
4
5
7