Questions tagged [stacking]

For questions about stacking of network devices. For instance, you are stacking a new set of switches or firewalls, where you need help with configurations or are troubleshooting a problem.

Filter by
Sorted by
Tagged with
0
votes
1answer
43 views

Adding cisco switch to an existing stack with slightly different naming convention

I'm new to networking and I'm gearing up to add a switch to an existing stack at my job. The existing stacks are showing the following when I issue the show version command: Switch Ports Model ...
1
vote
2answers
818 views

Cisco 2960x Stack IOS version mismatch

Hope some of you already have some hands-on experience with that - if you're adding a new switch to the stack and you get IOS version mismatch, can you still copy the bin image from the master to the ...
0
votes
0answers
29 views

Dual Juniper MX80 problem

We have 2x Juniper MX80 routers with only one currently being actively used. Second one is waiting to take over in the event of disaster. We also have two ISP's that deliver network to our MX80. We ...
2
votes
2answers
101 views

Connecting two HP 2910al Switches using SFP to get 2Gb/s speed

I would like to Connect my two HP 2910al switches using SFPs to get a maximum of 2G links. is this possible, and how? I want to make both of them to use the IP address (ex 192.168.2.xxx). I have the ...
0
votes
2answers
261 views

Two switches, one uplink - best way to link them?

Overview I have two Arista 7050SX switches. They don't support stacking. But I essentially will be using them as a stacked pair none the less (just means managing two individual switches). They're ...
0
votes
0answers
42 views

Prime Infrastructure IOS-XE device type recognition

Catalyst switches usually form a stack on boot up, even if they are not stacked. They just form a stack with themselves. So Prime Infrastructure reads out the model of the switch, that says it is a ...
0
votes
1answer
246 views

Cisco 9300 Stacking Issue -- Link OK Yes, Link Active No

hopefully another pair of eyes can help me out with this. We have 4 Cisco 9300-24Ts data-stacked with all cables detected by the switches themselves. Switch order and priority looks good, however we ...
1
vote
2answers
906 views

Endpoint MAC address change detection [closed]

A question regarding a host behavior when gateway mac address has changed (although it deals with Windows, I think it's the best forum). Assuming a windows host sending trafic to a destination IP, ...
4
votes
1answer
2k views

2-stacked switches with 2 uplinks to each ASA

My current single uplink from 2-stacked switches to ASA is not enough to cater the link utilization (upload traffic from the 2-stacked switches to ASA). So, I have thought of using 2 uplinks. If I use ...
9
votes
3answers
3k views

How many stack cables would be needed if we want to stack two 3850 switches

How many stack cables would be needed if we want to stack two 3850 switches : We have one 3850 switch and planning to add one more. So my guess is only one Power & One data stack cable would be ...
0
votes
1answer
101 views

Cisco 2960x: Adding a new cable to complete the "ring" with switches powered on - is it safe?

Let's say I've got a 2960x stack like the one shown below - as you can see one cable is missing as it was too short, so I ordered a longer one and am awaiting delivery. One thing I wonder about though ...
1
vote
1answer
183 views

LAG links between access switch and stacked switches

When an access switch is connected to two stacked switches through two links, is it necessary to configure LAG for those two links? (Those black links in the picture below.) Or the stacking would ...
1
vote
1answer
6k views

Cisco 2960X - Add Stack Member

I need to add another Cisco 2960x stack member to our existing stack and I just want to check that the steps I have in mind are correct: Power up the new switch and check that IOS matches that of the ...
4
votes
3answers
1k views

Theoretical: Bottleneck in a switch stacking environment

Quick question regarding stacking environments and their limitations regarding traffic bottlenecks. Assuming the following use case: We have a stack of 8 switchs, forming a Half 10Gbps stack ring. ...
0
votes
1answer
49 views

What happens if I press the Button in a Stack Setup on a 2960-X?

Someone recently push the Mode button for too long and the Switch Stack restarted in Express Setup. Is this the normal behavior on the Mode Button? Where were debating that the Whole Stack was not ...
4
votes
1answer
5k views

Adding a new switch to a C9300 stack

We currently have a stack of Catalyst 9300, like this : SW1 (master) SW2 SW3 We plan on adding a 4th switch, SW4, but in between SW2 and SW3. This would give: SW1 SW2 SW4 SW3 My question is : ...
2
votes
0answers
122 views

Renumbering Cisco 3750X Stack

I am thinking about renumbering my Cisco 3750X stack. Currently as it sits, the stack from top to bottom is Switch 5 Switch 1 Switch 2 Switch 3 Switch 4 I am wanting the stack to be renumbered to ...
1
vote
2answers
2k views

Switch Stacking and Redundancy

If switches are stacked together using StackWise, what happens if one of the switches goes down? Is switch stacking bad for redundancy?
0
votes
2answers
823 views

How can I connect (stack) two Cisco SG350 together?

I am building a storage network, physically separated from the data network. I have two Cisco SG350-28P-K9 V02 switches: One on the basement. Has two NAS, two ESX servers. (in use) One on the 4th ...
0
votes
2answers
102 views

switch died after slow to rapid failure now DHCP will not function across network even with new switch

ok so i'm running out of ideas here. we have/had 3 managed switches in our server rack and one in a closet; one hp procurve 3500yl 48 port with poe for 2 APs and 2 catalyst 2960s in the bottom of the ...
1
vote
1answer
166 views

Any expected issues with stack of 8 Cisco 3750X switches?

I am planning the network for our new offices this time utilising Cisco 3750X's (WS-C3750X-48P-S). The required port count has gone up and up so have had to procure some extra switches to bring the ...
5
votes
2answers
2k views

Cisco 3750-X Stack Bandwidth

I am currently managing a large datacenter spine-and-leaf topology. On our leafs, we use stacked 3750-X switches. I want to know how much bandwidth is currently going across the stack links (...
1
vote
2answers
297 views

Can you stack Cisco 350 28P PoE switches with CAT5E or CAT6 ethernet cables?

I have four new Cisco SG 350 28P PoE switches, but no stacking cables. Can I use CAT5E or CAT6 ethernet cables to accomplish stacking them?
0
votes
1answer
408 views

Stack Configuration remove

i have only one cisco 2960 running at location. Switch neither connected in stack nor any cable connected, still in running configuration, it shows switch is in stack and having two two interfaces ...
0
votes
0answers
2k views

Cisco 2960X stacked switches pop up ACL error messages without any ACL configured nor input

I have a few Cisco 2960X with the fiber flexstack modules, when I boot them up, I always got these message: 'Duplicate sequence number. Failed to add ace to access-list' These are brand new switches ...
2
votes
1answer
450 views

HPE IRF Stack why do I need two physical ports?

I'm building exactly the same topology, but there is no explanation why do I need two physical interfaces in IRF stack? So, can someone please explain me, why do I need two physical members in IRF ...
1
vote
1answer
442 views

How many stacking cables does a pair of stacked Dell switches need?

According to https://www.dell.com/support/article/us/en/04/how10356/how-to-stack-n2000-or-n3000-switches, when stacking Dell Switches, one should perform the following steps: For each switch in the ...
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 ...
1
vote
1answer
9k views

C3850 switch active/standby question

We have Cisco catalyst C3850-48T L3 switch in stack. and it is showing Active/Standby. Question: what does standby mean in stack? Does it means if i plug my laptop on standby switch port it won't ...
2
votes
1answer
353 views

Stacking Dell N3000 with and without stacking cable (distance)

First question here. I have a new scenario that I am not sure on how to achieve. I have a stack of two Dell N3024 switches (our core stack), that I need to add two more units to. However, these two ...
2
votes
1answer
96 views

Connecting VDX6740 to ICX7750 core network stack

I am trying to figure out how to configure both MSTP for the core network and if I will need to enable MSTP on VDX6740 for this diagram after adding the new datacenter switches: Diagram link: https://...
5
votes
2answers
31k views

Remove switch provisioning from individual switches

I've been given two switches to work on, which separately have been used in a stack previously. One switch for one stack, and one switch for another st.ack in a different building. So they're not ...
1
vote
2answers
1k views

Netgear SFP and trunking between three switches

Can you use SFP stacking with trunking? We have two Prosafe S3300-28x switches stacked using two SFP cables. These switches also have two 10Gig ports, which we would like to connect to a separate ...
3
votes
1answer
918 views

HP Stacking Not Joining

I have 2 HP 2920 switches and they aren't stacking as I'm expecting. Both models are the J9729A, however one is Aruba branded and one is the original HP brand. Everywhere I read this shouldn't be an ...
2
votes
1answer
104 views

2960 x Switches Stacking

can we have POE & NON POE Switches Stacked in on loop Exp( 2 nos of 2960 X 48 FPDL and 2 nos of 2960x 24 Port TDL
2
votes
2answers
665 views

D-Link Stacking

I want to stack two D-Link DGS 1510 with each other. Both of the switches already have a running config. My question is if one of the running configs will be used for the new stacked switch or that ...
5
votes
2answers
13k views

Addition of new switch to an existing 3850 stack

I have a existing switch stack with 4 switches in the stack (all of them are 3850). Switch Ports Model SW Version SW Image Mode ------ ----- ----- ----...
4
votes
2answers
2k views

Stacking Cisco Catalyst 3850 via Fibre?

I'm working at several new network concepts for our company and the challenge is to stack at least two Catalyst 3850 over a distance of 200-300 meters. I know there are other possibilities like VSS or ...
1
vote
1answer
349 views

Updating config on 2960s Stack by copying from FTP

I'd like to upgrade a stack of Cisco 2960s switches with a new configuration, and I would like to know what is required to copy a pre-populated config.text file from an FTP server to the switch stack. ...
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 ...
4
votes
2answers
2k views

Stacking Different Model Dell Switches

I have 2 brand new Dell 5448 1 Gbps switches and an older 3448P. The newer switches stack with each other via an HDMI cable and have the ports for fiber optic, but the older 3448P switch has no HDMI ...
5
votes
2answers
4k views

Changing The Stack Master of a Catalyst 3750 Without Losing Connection

Currently I have 5 Catalyst 3750 V2-48TS as slaves and 1 Catalyst 3750g 24TS-1U as the Stack Master. I was wondering if there was any way to change the Stack master to one of the slaves without ...
6
votes
1answer
1k views

Cisco 2690x-Flex stack not working

I have 2 identical Cisco 2690x with flex stack plus modules installed in both. I have provisioned the first and it is up and running. When I add the second to the flex stack module and turn it on, it ...
1
vote
1answer
434 views

Stacking different HPE switches

Is it possible to stack 1 Aruba 2920-48G (J9728A) with 1 Aruba 2930M-48G (JL321A) each with its proper stacking module ?
1
vote
1answer
3k views

Interface suspended when linking access to core

Some help required please. I have a stack which contains two access switches, and an interface from switch 1 has a successful link to the core. However, when I try adding a secondary link on switch ...
1
vote
3answers
3k views

Is possible to stack/uplink different brands of switches using SFP?

I'm sorry if it's a silly question but in networking things I'm a complete newbie. We have some switches (DELL) two of them are connected with SFP (fiber) along a long hall, the rest are stacked via ...
1
vote
3answers
3k views

Stacking master and member correctly

I have two Cisco Catalyst 2960-X Series switches which I've stacked. I want the master to be switch 1 and the member to be switch 2. After doing research on stacking the switches, it's my ...
0
votes
1answer
807 views

3Com 5500G EI Switch Stack Configuration

I have 2 3Com 5500 switch in stack and one of them is fault, I want to replace them with a new switch, which configuration must be added to the new switch before it can be added to the switch stack? (...
3
votes
1answer
2k views

LACP trunk between BNT layer2/3 switch and Cisco 2960s stack on a bladeCenter H

My objective is to replace a Nortel 5520 stack with a stack of Cisco 2960s. The old working configuration was using mlt trunk between 5520 and BNT layer 2/3 switch. I will use LACP for the trunk ...
0
votes
1answer
121 views

Accessing D-Link stack members separately

I have a D-Link switch stack, can not figure out how to fore needed switch to became a master using config stacking force_master_role I simply do not get what will this command to and the D-Link's ...