Questions tagged [cisco-catalyst]

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

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How to capture switch generated traffic on Catalyst 4500X

I have a Catalyst 4500X. I want to capture traffic associated with the DHCP relay service which is running on the switch. I created the acl: Extended IP access list capture 30 permit udp any any ...
Appleoddity's user avatar
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1 answer
65 views

Cisco 9300 switch doesn't connect via SSH

I have a couple of switches that are trunked via a LAN cable from another switch. I noticed that these switches sometimes have a hard time to SSH into. I get the error: "Connection timed out"...
Rick151's user avatar
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9410r Supervisor engines aren't operating redundantly

We have a newly installed 9410R that has a dual supervisor and when powering on the switch it boots up normally and when the secondary supervisor powers on and takes over as the primary and shuts off ...
R3ne's user avatar
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Reset and Login Issues with C9500-48Y4C Switch

I have a Cisco C9500-48Y4C Switch, but I forgot the login credentials while configuring it, which has resulted in me being unable to access the Switch. Could you please guide me on how to reset this ...
berniecheniitt 's user avatar
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1 answer
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How to access SVI from the other side of a tunnel? [closed]

With two vlans separated by an IPSec tunnel, I'm having issues reaching an SVI on the far end. Hosts on either end can ping each other without issue, but the SVI's do not respond from the far end, ...
chrismec's user avatar
2 votes
1 answer
68 views

cisco catalyst 6500 not honoring static ip assignments

I have a catalyst 6500 sup720 running 15.1(2)sy6 and i have attempted to have a set of mac addresses to get a specific ip from dhcp. below is what shows on the bindings. 10.1.4.200 01e0.508b....
Kendrick's user avatar
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Verify brand name of installed SFP on Cisco Switch

I know I can run the sh inv to view the SFPs model and Serial Numbers attached on a Cisco Switch. Is there a way to verify the brand name of each SFP? I have Cisco 9300 and 9606 switches.
Rick151's user avatar
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Fast port connection and ability to daisy chain unmanaged switches on Cisco Catalyst [duplicate]

I have a Cisco Catalyst 2960-S that I use in a home environment. In the configuration I currently have (very basic, basically just switchport mode trunk on upstream and switchport mode access on reset ...
drcomputer's user avatar
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111 views

Cisco: 9606R Switch Firmware update

I have updated my other Cisco 9300 switches, but am a bit confused on how to even select the right firmware for my Cisco 9606R Core. If I run sh ver it displays the following: Cisco IOS XE Software, ...
Rick151's user avatar
1 vote
1 answer
201 views

Cisco ports shutting down temporally due to arp-inspection

We have a couple of Cisco 9300 switches. We had the switch configured using STIGS. A couple users have complained that their Avaya phones restarted. I started running the show logs and noticed the ...
Rick's user avatar
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HighCPU-Power RPS Process

By chance no one encountered such a problem, periodically due to the "Power RPS Process" process, the processor is very heavily loaded,accordingly, I constantly receive alerts about a high ...
Глеб Щеголев's user avatar
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Cisco 3650 and wifi hotspot

I have to connect wifi hotspots on cisco catalyst ports of cisco 3650. The wifi controller is connected on 2 ports, because it delivers 2 wifi vlans (6 and 40). The hotspots must receive an IP from ...
AnthonyS's user avatar
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1 answer
150 views

Cisco 2960x High CPU usage when transferring firmware

I am trying to transfer a new .bin file to a Cisco 2960x switch. Whenever I do this the CPU spikes to 100% and the maximum transfer rate is 35KB/s. A 28MB file takes 15 min+. I've tried the following: ...
Appleoddity's user avatar
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1 answer
95 views

Correct interpretation "show mls qos"

I ask you to tell me in the correct interpretation of the output of commands on the Cisco Catalyst 3750. command "show mls qos interface fastEthernet 0/3 statistics". Outputs the following: ...
Глеб Щеголев's user avatar
1 vote
1 answer
518 views

Cisco interface vlan (shutdown vs no ip address)

What is the difference in functionality between these two commands. interface Vlan10 shutdown interface Vlan10 no ip address I haven't been able to find any source material, but I've seen other ...
Derrick Moeller's user avatar
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1 answer
84 views

High latency - dense-sparse mode PIM

Colleagues, good day! In my prod, I notice large delays to some switches behind which there are hosts with multicast reception I wanted to know if my multicast is set up correctly, is it normal that ...
Глеб Щеголев's user avatar
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118 views

MODBUS TCP server with CISCO C-9300

I am planning to use the MODBUS TCP Server with the C9300 switches. Yet, I found the following guide: CIP and MODBUS Configuration Guide, Cisco Catalyst IE3x00 and IE3100 Rugged, IE3400 Heavy Duty, ...
Mhd Ghd's user avatar
1 vote
2 answers
147 views

What issues can rise from web gui config changes then making other changes from the CLI?

I'm using a 9200L Cisco switch If I make changes in the CLI, then I make changes in the Web interface and vice versa. Will there be issues down the road with the config file getting corrupt or ...
13months's user avatar
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1 answer
333 views

policy based routing to send one host to a different internet gateweay

I have a Cisco C3560X with multiple internal networks (10.0.0.0/24, 10.0.1.0/24, et.) and two internet connections (10.0.0.3 and 10.0.0.4). The default gateway for the internal subnets is the switch (...
longneck's user avatar
  • 464
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29 views

Network Tapping cat3750/3850

I work with tapagg solutions as an NDR engineer. Upgrading my lab for various reasons. Right now I SPAN with an old cat2960 into my packet system. I need to bump up to gig span and would like some 10G ...
steve hood's user avatar
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1 answer
259 views

What is the ssd LUKS file on the (boot)flash of newer 9k Catalyst switches?

On a couple of our recent Catalyst 9k switches running IOSXE 17.3.x we've noticed a file with the name 'ssd' on the (boot)flash: filesystem. switch#dir flash: Directory of flash:/ 270353 -rw- ...
bylie's user avatar
  • 11
2 votes
1 answer
732 views

Switch Stack 9300 family

Can I stack 9300X with C9300-48P? I have a site that need to use 18 spf port and 48 copper port so i don't need them to purchase 3 switches C9300-48 ports to get 18 ports that will be expensive so i ...
RR Cisco's user avatar
2 votes
3 answers
705 views

what is switch device mac address?

I'm studying STP protocol and how to configure STP on switches. I know each switch has several ports and each port has one MAC address. but when I read the below article I noticed that it allocate one ...
hamed's user avatar
  • 165
3 votes
1 answer
439 views

Cisco 9400-Supervisor Engine 1XL uplink help

I have inherited a Cisco 9400 with 6 line cards installed. I am trying to use some ports on one of the cards. I noticed that there is no link activity lights, no indication of any activity. I think ...
jim's user avatar
  • 85
6 votes
1 answer
3k views

Cisco 9300 Software upgrade without automatic reload

Is there a way to upgrade a Cisco Catalyst 9300 switch to a new software version without the switch automatically reloading as part of the initial install process? With other switches (eg Cisco ...
The Footsie's user avatar
1 vote
2 answers
556 views

events log in cisco

Is there log file just like events file in windows showing what happened,who did what, kind of ? I could not see with show archive log.some switch goes down and support guys plug off/on cisco switch, ...
hakkican's user avatar
  • 145
2 votes
1 answer
2k views

Unable to disable CRC check on Cisco 2960-X

I have a 48 port Cisco 2960-X running IOS Version 15.0(2)EX5. I'm trying to connect it to a Ubiquiti EdgeRouter4 using a Ubiquiti DAC Twinax cable.. I'm aware that this is technically not recommended, ...
robertmain's user avatar
0 votes
1 answer
365 views

High RX Pause Frame on Cisco 2960X

I have a Ruckus R310 that connected to Cisco 2960X and I saw a high RX pause frame. show flowcontrol interface gi1/0/1 Port Send FlowControl Receive FlowControl RxPause TxPause ...
sandy blaza's user avatar
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0 answers
185 views

Using QinQ without extra switch

I was wondering if it's possible to use QinQ to send all traffic from a switch out on one interface using a QinQ tag on all frames. What I need is to setup a wireless link between two sites using two ...
pythonnoob's user avatar
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1 answer
2k views

Stacked Cisco C9200 firmware upgrade

I am driving myself a little bit mad on this one. I am planning an IOS 16.12.04 upgrade (from 16.12.02) on two stacked Catalyst 9200 switches. These switches are located in Germany (I am located in ...
Mike.Borg's user avatar
0 votes
1 answer
1k views

Cannot Create Subinterface on C3650 L3 Switch

We have WS-C3650-24TS Catalyst L3 switch. I am trying to create a sub-interface on the ports but cannot make it work as the following error shows. Is there something I'm missing? Sorry, newbie here.
Carl's user avatar
  • 3
0 votes
1 answer
223 views

test etherchannel load-balance command doesn't work

I am trying to learn the etherchannel environment but when I enter this command it gives an error. Switch#test etherchannel load-balance interface po1 mac 00d0.ba86.1e19 00d0.ba86.1e1a ^ % ...
Red And Black's user avatar
0 votes
3 answers
2k views

transfer vlan from one cisco switch to an other through a central cisco switch

I can't figure out how to pass one vlan from one switch to an other: Let's say, I have 2 valns: Vlan 1 and Vlan 2 3 cisco switches: Cisco Catalyst 3560g (central switch) Cisco SG-300 (with native ...
igoryonya's user avatar
  • 101
2 votes
2 answers
3k 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 ...
Martin Ledermann's user avatar
2 votes
0 answers
52 views

Private VLANs implementation [closed]

So, I have campus LAN, implemented as many VLANs with InterVLAN routing, that spreads on tens of L2 switches and one L3 switch. Now, I have request that hosts on one VLAN don't see each other. But, ...
John's user avatar
  • 812
6 votes
2 answers
4k views

How do I know the switch is layer 2 or layer 3?

Is it possible to find the switch is Layer3 or Layer2 in (Switch)CLI? Is there any command to check whether the switch Layer(Layer 3 or 2) in CLI?
sjarasan's user avatar
  • 125
1 vote
2 answers
2k views

How to Change the Date on Cisco Catalyst 3750x Switch

We are using cisco catalyst 3750x 24 port switch series How to Change the Exact Date(Singapore) on a Switch ASW-G-L09-001#show running-config Building configuration... Current configuration : 11883 ...
sjarasan's user avatar
  • 125
0 votes
1 answer
2k 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 ...
Jim's user avatar
  • 813
0 votes
2 answers
722 views

Cisco Port forward ip nat inside source static ... Invalid

This is almost the same question as How to setup port forwarding on Cisco Router running Version 15.2(4)M6. The problem is that the command used in the answer is not available: ip nat inside source ...
ahab's user avatar
  • 1
0 votes
1 answer
702 views

How do I find out the thoroughput of a Cisco Switch?

I am trying to find out the thoroughput of our Cisco 2960 & SG300 switches. Is there a CLI code I can run to find this?
Jackie's user avatar
  • 11
0 votes
2 answers
466 views

Best practice / advice for cisco 3560 behind Virtualised OPNsense

Currently I run the below scheme. The problem is that when ESXi is down it takes down all the network with it, so I have to boot up another router to log in to it. WAN > OPNsense (in ESXi)> ...
Diosim's user avatar
  • 1
0 votes
2 answers
3k views

intervlan routing with PfSense

I Need some guidance on getting my lab networking configured. Any support is appreciated. My Lab consists of: 2 cisco switches: 2960s(access layer 2) and 3750X(ip routing/layer 3) Xenserver with ...
BocajNET's user avatar
1 vote
1 answer
222 views

PortFast For Some Networks But Not Others

I have 4 offline self contained networks. They are setup as such: Network 1: Windows Server 2016 As Domain Controllers And Windows 10 (1909) Clients Connected by Cisco C9300-24Ps. Network 2: Windows ...
JukEboX's user avatar
  • 461
1 vote
0 answers
89 views

Cisco QinQ - More than one s-vlan on dot1q-tunnel for the same c-vlans

I have a scenario where I have 3 service vlans (10,20,30) from a trunk port and need to brige our customer vlans (100,200,300,400) between all the service vlans. I need to do it all in the same switch ...
Radu Radu's user avatar
0 votes
2 answers
499 views

When do ACLs on SVIs get applied on Cisco Catalyst devices?

I don't understand exactly when an ACL will get applied when on an SVI. Given the following (pseudo) configuration int vlan 100 ip address 10.0.0.1 255.255.255.0 ip access-list in in ip access-...
John Moffitt's user avatar
3 votes
1 answer
391 views

cisco switchport trunk native vlan

we have switch catalyst 3850 and we need to enable the PXE boot on a port configured in trunk with configured three VLAN (4040, 4050 and 4060). To permit the PXE boot and deploy to work we set on the ...
AtomiX84's user avatar
  • 145
1 vote
1 answer
85 views

QoS policy definition - Cisco guidelines vs reality

Currently designing a QoS Policy for a customer (Cat 4500 models), following the business needs, I will work on a 8-class based model definition. Cisco has several guidelines under this perspective, ...
bdes31's user avatar
  • 1,085
2 votes
1 answer
3k views

Link Aggregation from Cisco to Palo Alto using 10 gig interfaces, port on Cisco shows "waiting to be aggregated"

I am trying to bundle two 10-Gig interfaces on PA-3020 to Cisco Cat9300. Previously, I had bundled two Gigabit interfaces on same devices and everything worked fine. But now, when I try to configure ...
Ankit Badani's user avatar
2 votes
1 answer
180 views

Cisco C3750X power supply: difference between /1 vs /2?

What is the difference between the C3KX-PWR-350WAC/1 and C3KX-PWR-350WAC/2 power supplies for the Catalyst 3750X series? I have a bad power supply, and I can't remove the failed one right now to ...
longneck's user avatar
  • 464
0 votes
0 answers
192 views

Cannot create connection between two routers in same VLAN via switch

I currently have a Cisco 2960-24TT switch (switch1) and a Cisco 1841 router (router1) that form part of my core network connecting other VLANs and devices. The two ports on router1 have been ...
Manny265's user avatar
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