The tag has no wiki summary.

learn more… | top users | synonyms (1)

1
vote
1answer
42 views

Cisco Catalyst 2960S boots to “MLG System”

We have a brand new Cisco Catalyst 2960S that while connected to the console during boot is booting to the following: File ...
1
vote
0answers
11 views

IGMP Snooping limitations and when do you start to use PIM?

At a head end I've just inherited, all our multicast streams run on cisco switches with IGMP snooping enabled. Because all these streams are to be kept local and isolated we've never really looked ...
0
votes
0answers
74 views

Cisco tacacs+ commands accounting

I've installed a tac_plus server to log commands executed on my Cisco catalyst 2960-s switch, with the following config key = "tackey" user = root { default service = permit member = admingroup login ...
0
votes
0answers
39 views

Switch troubles - Cisco Catalyst 2950T 24

At my new workplace, thanks to the old system administrator, we have an unused Cisco Catalyst 2950T 24 (two gigabit ports, 24 100Mbit ports). It was used in a quite weird setup (the place has two ...
3
votes
1answer
40 views

Logging commands on cisco devices

I'm searching for a way to log every command executed on a cisco switch/router, I have a catalyst 2960s with lanbase image, and a catalyst 4500e with ipbase image. I've found a way to log commands ...
1
vote
0answers
104 views

How to create a link between GNS3 and a VMWare Workstation VM that is totally isolated from the physical host?

My physical host machine runs windows server 2012 R2 with a DHCP server. I have the following topology in GNS3: Windows Server is the physical machine, it is connected to both VMNet 2 and VMNet 3 ...
0
votes
0answers
87 views

How to handle 802.1x authentication system with incompatible clients devices?

I would like to split my wired network into multiple VLANs. In order to do that, I think I will use dot1x authentication on my Cisco Switchs (2960S and 2960G) RADIUS will be handle through NPS on my ...
1
vote
2answers
28 views

Is it possible to set up a X450e-24t to handle network routing and gateway?

Good morning all! Very very junior tech support here so forgive me if this is not possible. I just started somewhere and they have a Cisco Catalyst 6509 running that they say; "Just handles network ...
-1
votes
1answer
83 views

Cisco - what is the purpose of a gigabit ethernet switching module

Cisco noob here Recetly while looking for a cisco switch and router combination for my CCNA studies i won this bid for a (I added the bid to keep track of it and i ended up winning it) ...
1
vote
1answer
152 views

Cisco Catalyst 3560 PoE 48 with setting interface to auto qos voip trust

All I'm trying to do is copy the running-config from a Cisco Catalyst 2560 PoE 24, to a Catalyst 3560 PoE 48. This is f0/1 from the original switch: interface FastEthernet0/1 switchport access vlan ...
2
votes
2answers
58 views

What drawbacks does VTP pruning pose?

I'm currently learning a bit about Cisco switch configuration and VLAN configuration, specifically VTP. Reading on Cisco's site, the feature of VLAN pruning appears to not be used on a switch/VTP ...
0
votes
1answer
991 views

How to configure a Cisco Catalyst 2960 to synchronize with an NTP server

I would like to synchronize a Cisco Catalyst 2960 series switch with a publicly available NTP server such as time.apple.com. I have reviewed the knowledge base article here: Catalyst 2960 ...
4
votes
6answers
707 views

I have a Cisco Catalyst 2940 and want to connect to it via the network. How to find its IP address?

Since my computer has not serial port, the serial cable is of no help. Does the Catalyst 2940 acquire an address via DHCP? At least my DHCP server doesn't show any address which has been requested ...
0
votes
1answer
815 views

How do I connect two Cisco Catalyst 2950 over LAN?

I'm trying to connect (2) Cisco Catalyst 2950's over each's respective FastEthernet 0/1 ports, but for some reason, they're not communicating. I'm doing this to physically extend my network and add ...
1
vote
2answers
62 views

Cisco IOS - Stuck in Read Only Mode

I can't figure out what happened but I can not enable privileged mode in my Cisco 3750. At first, I tried: enable to enter EXEC mode. My password would not work and it kicked me out after 3 ...
3
votes
2answers
249 views

How to push configurations to multiple Cisco Switches

Assume I have around 50 Cisco IE2000 Switches connected together and I want to reconfigure some settings, the same settings for every switch. Normally I would open a command line session via Putty ...
10
votes
3answers
1k views

Native VLAN mismatch and missing VLAN?

I'm trying to wrap my head around what exactly is going on here with a new site's configuration of their networking stack. This particular piece I am working is pretty simple but I having a hard time ...
2
votes
0answers
58 views

Does Cisco IOS XRv support logging of TCP connection (e.g. built and/or teardown)?

I have a demo of Cisco IOS XRv and I would like to setup logging for connections. E.g. for ASA "show logging" shows log messages for every TCP connection built or teardown: Jun 11 12:29:31 ...
1
vote
0answers
109 views

How can I add ACL entry comments on a Cisco 3750?

I'm trying to find the best way to add comments into my access-lists. For the moment, the only maneer I found is the following one: switch#conf t switch(config)#ip access-list extended VLAN-TEST3 ...
1
vote
1answer
70 views

Is there any advantage or reason with vertical chassis switch?

When I was looking for Cisco 6500 series chassis, I saw that there are horizontal(6509E) and vertical chassis(6509VE). Although 6509VE has same(or almost same) chassis height as 6513E, but 6509VE ...
1
vote
1answer
65 views

Will a Cisco WS-X4548-GB-RJ45 switch module fit in a 3825 router chassis

I currently have a NME-XD-48ES-2S-P 10/100 switch module in my 3825 router and am looking to upgrade it to a 10/100/1000 switch. I found a pretty good deal on the WS-X4548-GB-RJ45 switch module, but ...
1
vote
1answer
639 views

How to enable Cisco switch port mirroring without rebooting?

I have a Cisco WS-C2960S-24TS-S switch and would like enable a port mirror for network analyzer (such as Snort). I could not see any options in the GUI interface. Is it possible, and how do I enable ...
0
votes
0answers
444 views

i am not able to pass dhcp requests across vlan

I am running dhcp on server 2012 and an astaro UTM firewall. I have a catalyst 3560 with vlan 20, 30 and 40. vlan 20 being the native vlan. When using astaro firewall for dhcp with scopes for each ...
0
votes
0answers
171 views

Need help setting up DHCP to give ips to different vlans

I need helping understand what am doing wrong. I am using Astaro UTM firewall software as my gateway, which is attached to a 3560 cisco switch. The switch as 3 vlan ( 20, 30, 40) and the firewall had ...
1
vote
0answers
113 views

Cisco Auto Smartports on catalyst 2960-s

I have Cisco Catalyst 2960-s, I want to configure user defined macros on it. I searched a lot in Cisco documentation but its not for beginners :( How to create a user defined macro that runs when a ...
-2
votes
3answers
122 views

Cisco switch inter-vlan access

I have Cisco Catalyst 2960-s switch and I want to configure three Vlans (A; B; C) I want to : Allow traffic between A and B Allow traffic between A and C Block traffic between C and B or if ...
2
votes
1answer
330 views

Spanning-tree setup with incompatible switches

I have a set of eight HP ProCurve 2910al-48G Ethernet switches at my datacenter that are set up in a star topology with no physical loops. I want to partially mesh the switches for redundancy and ...
11
votes
2answers
841 views

Encryption over gigabit carrier ethernet

I would like to encrypt traffic between two data centres. Communication between the sites is provided as a standard provider bridge (s-vlan/802.1ad), so that our local vlan tags (c-vlan/802.1q) are ...
1
vote
2answers
6k views

Linux Centos6 adapter bonding - Cisco 2960S EtherChannel LACP

I want to connect a CentOS 6.4 Linux Box with two NICs to a Cisco 2960S using LACP 802.3ad port aggregation. This mainly for redundancy reasons (and hopefully more bandwith). We don't use VLAN ...
1
vote
1answer
86 views

Connect Aironet to Catalyst Switch

I have a Cisco Aironet 2602E-A-K running 12.4(25e)JA1 with a Gig ethernet port defined as so: interface GigabitEthernet0 no ip address no ip route-cache duplex auto speed auto ! interface ...
0
votes
1answer
427 views

How to allow IGMP traffic on Cisco switches?

I have a network formed by some Cisco switches (a 2960 at the center, some 2950s for distribution). The network uses VLANs, and there are trunks between the various switches. Computers in the same ...
7
votes
1answer
3k views

High latency/drops between Cisco switches in two locations. How to troubleshoot?

I'm receiving user complaints about poor network application performance between two parts of a large warehouse facility. The software is a curses-based terminal application running on a Linux server. ...
0
votes
3answers
1k views

Connect to cisco switch using shell script

I would like to run a daily script the cleans my switch arp. I enabled SSH on my switch. how do I connect to the switch using a simple shell script? I'm not sure how to provide the SSH password and ...
0
votes
1answer
62 views

Cisco MOTD from external source

Is it possible to have the MOTD Banner set from an external source while maintaining a hard coded value (if present)? Possibly like a TFTP server? Only way I have ever seen this done is via it being ...
0
votes
1answer
176 views

Programmatically interfacing with Managed switches (Cisco 3750)?

I work at an organisation that has a few thousand computers and around 100 switches. To help with the stock take for the computers I would like to programmatically access the managed switches to find ...
0
votes
2answers
2k views

Cisco IOS debug commands and packet monitoring

There is a long list of debug commands. Are there any debug (or other IOS) commands which can capture detailed packet or frame (layer 2, 3) data across an interface? I know we have ...
0
votes
1answer
184 views

Jumbo Frame configuration & VMware

I am hoping one of you can help clear up some of my confusion on this matter. We have 2 new catalyst 3750 switches to support our VM hosts and SAN arrays. The SAN arrays utilize jumbo frames with an ...
1
vote
1answer
635 views

Cisco 3750 switch wont transmit radius request to server

We have a radius server running on our lan and i am able to authenticate against it through direct link to the server. However when we want our clients to connect through our switch (cisco 3750 ...
0
votes
1answer
680 views

Find client IP connected to VLAN from Cisco Catalyst 3600 by SNMP

I would like to get using of course SNMP, list of client IPs connected to VLAN in Cisco Catalyst 3600. So far, I have pseudo-algorithm made by me which obtains those IP addresses, but I am not sure ...
0
votes
0answers
370 views

Cisco WS-C4948 vlan1 management from outside

I'm trying to get a catalyst going for remote management using cisco network assistant. I've basically, enabled telnet; enable conf t line vty 0 15 password {password} login exit gave it an IP ...
0
votes
2answers
994 views

XenServer 6.0.2 and Cisco 3550 vlan configuration

I am running a couple of xenserver 6.0.2 hosts with multiple vm's on them. All the xen hosts have 4 physical network ports connecting to the cisco. Each port is untagged in xen but is tagged to a vlan ...
0
votes
1answer
397 views

Single Cisco ASA, Replacing single 2960 switch with 2 x 2960G's and VLANS

I have a Cisco ASA5510, IOS 7.2.5 Presently it is connected to a single Cisco 2960 with VLAN's 10,11,12, configured as subinterfaces on E0/1, which are also the internal default gateways for the ...
1
vote
2answers
423 views

Cisco IOS switch dropping legit DHCP requests

We have Cisco Catalyst 4507R running IOS v12.2 that appears to be dropping valid DHCP requests. Checking for the requests using tcpdump on the DHCP server and on a machine connected to a monitoring ...
6
votes
2answers
3k views

HP to Cisco spanning tree root flapping

Per a recent question I recently configured both my HP (2x 2900) and Cisco (1x 3750) hardware to use MSTP for interoperability. I thought this was functional until I applied the change to the third ...
2
votes
2answers
2k views

Configure spanning tree from HP to Cisco hardware

I have three switches I'd like to configure in a loop - a Cisco stack (3750s) and two HP 2900 series. Each is connected to the next with a 10 gig backplane of one form or another. How do I configure ...
0
votes
1answer
214 views

Cisco redundancy modes

I am using a Cisco 6500 series with an SSO redundancy configuration. The show redundancy output is as follows: Hardware Mode = Duplex Configured Redundancy Mode = sso Operating ...
0
votes
2answers
2k views

How do I connect to and factory reset a Catalyst 3560 Switch? [closed]

My company just bought another company. In their server room they had some older hardware, which I would like to repurpose. One of these is a Cisco Switch: C3560G-48TS-S. I found some instructions ...
9
votes
2answers
4k views

Is my Cisco switch port bad?

I've been chasing a packet-loss and network stability issue for a handful of end-users on an internal network for the past few days... These issues surfaced last week, however the location was struck ...
2
votes
2answers
552 views

I can't display running-config on cisco catalyst at privilege 15

Note: All password have been replaced or redacted. I'm trying to create a (rancid repo) account that can use the command "show run" without enabling and using a second password. Right now, I add ...
3
votes
2answers
1k views

How do I find out which physical port my ethersvi MAC address corresponds to on a Cisco switch?

I'm doing a layer2 network map (my first) and this is the first virtual mac I've encountered. From the mac address table of switch1, I have VLAN 1 6416.8d98.52c0 DYNAMIC Te0/1 and on the ...