0
votes
1answer
67 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 ...
1
vote
2answers
36 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
71 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 ...
9
votes
3answers
256 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
29 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
42 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
46 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
55 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
192 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 ...
1
vote
0answers
89 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
102 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 ...
0
votes
1answer
236 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
2k 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
1answer
57 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
135 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
1k 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 ...
1
vote
1answer
430 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
442 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
237 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
780 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 ...
6
votes
2answers
2k 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
1k 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
171 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
0answers
1k views

Trunking between Cisco 1800 router and Cisco Catalyst 2960 switch

I would like to establish trunk between Cisco router 1812 and Catalyst 2960 switch. What I would like to have is that router gets ip address on his fe0 interface and on fe2 provides trunk with 3 VLANs ...
9
votes
2answers
3k 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
408 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
1answer
972 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 ...
2
votes
2answers
577 views

How do I draw a layer 2 (link layer) network map containing Cisco and *NIX boxes?

I've been tasked with drawing a layer 2 network map of our very small datacenter network. There is one 1841 cisco router, two 3560 cisco catalyst switches and 4 solaris sunfire T-1000 boxes. I have ...
0
votes
2answers
3k views

How do I change my password on a Cisco Catalyst 2960 switch?

I was given a username and a temporary password on a catalyst switch and I can't figure out how to change my password... Upon googling, I found this but when I raise my privileges to 15 by typing ...
15
votes
2answers
1k views

What is this item that came with my Cisco switch?

We just received a new Cisco Catalyst 2960, and in the box came an item we've never seen before. Interestingly enough, the documentation shows an image of the object, but it is not listed anywhere ...
1
vote
3answers
5k views

Configure cisco switch remotely without console access

Since Cisco in their newer firmwares disabled access to the web interface before password is set on the switch I need an alternative way of configuring switches remotely. I read up on the Cisco Smart ...
1
vote
1answer
1k views

Why is my Nexus 5548UP not adding ARP entries for the trunk to a 2960S?

I have a Nexus 5548UP trunked to a Catalyst 2960S. I have verified that spanning tree is working. I explicitly made the 2960S the root bridge for all VLANs as a temporary measure since it is trunked ...
0
votes
2answers
464 views

Teaming on Cisco Catalyst switch

Hopefully an easy one for someone... If I'm setting up either an MPIO or Team/bond on a Windows server, does a channel group need setting up on the Cisco Catalyst switches that they're connected to? ...
1
vote
2answers
3k views

Vlan Management Policy Server ( VMPS) Configuration and Management

I am trying to design a topology in which I need to use VMPS and unfortunately the resources are rather few on the internet. Based on this Configuration document VMPS I have created a sample ...
0
votes
1answer
242 views

Can't ping/SSH into brand new Cisco Cat4510 switches

I have copied configs and IOS from known good/in place switches (making obvious changes to VLAN IP's, ports, etc), but cannot ping VLAN1 on the new switch from my laptop though I can from another ...
0
votes
1answer
150 views

Multiple ACL on Cisco Catalyst with QoS classes - behaviour

I would like to limit the traffic to 2 Mbit for several IP addresses. With the following configuration, will each IP be limited to 2 Mbit or is it all IP addresses combined? Configuration: ...
1
vote
1answer
202 views

Cisco BPDUGUARD and BDPUFILTER

What happen if I have both ENABLED spanning-tree BPDUFILTER and BPBDUGUARD on a specific port?
0
votes
1answer
511 views

CISCO: ARP Poisoning Countermeasures

How can I prevent the Cisco Catalysts 2950/2960/3550/3750 from being vulnerable to ARP Poisoning? Can this be avoided with the ARP INSPECTION? Thanks
0
votes
2answers
244 views

Cisco switch sending out excessive STP packets

I have a Catalyst 2900 that's sending out an STP packet about once ever 1-2 seconds. Is that excessive?
2
votes
2answers
217 views

Multiple catalyst switches

We're about to do a major office move, which will involve re-cabling everything in our premises. We're in two floors of a single office building, with 2-4 comms cabinets on each floor; each of these ...
1
vote
2answers
795 views

Management VLAN Cisco Catalyst

I have configured a couple of VLANs on a Cisco Catalyst switch with IOS, i will put all the ports that clients is connected to, into these VLANs. I want to configure the native VLAN [vlan 1] as ...
2
votes
2answers
1k views

Cisco router and switch configuration

I want to configure a Cisco 2600 series router to be DHCP server. To the ethernet port i want to connect a Cisco Catalyst 2900XL 24 ports switch, in this switch i want to connect a computer in port ...
5
votes
1answer
499 views

Setting spanning tree link “priorities” in Cisco switches

I've got a pair of C2960G-48 switches (running IOS 12.2(46)SE, if it makes a difference) with redundant trunks in place. On these switches there are a bunch of VLANs that carry quite heavy traffic at ...
1
vote
4answers
737 views

CISCO 3550 HW Crash

were facing 5 Cisco CAT 3550 crashes now, we send out configuration to 3rd party company CISCO Gold partner and did environment power checking with the server site, no clue as yet what would be the ...