Questions tagged [cisco-catalyst]
A tag for questions related to Cisco's Catalyst line of switches.
333
questions
1
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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 ...
- 121
0
votes
1
answer
15
views
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 ...
0
votes
0
answers
32
views
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 ...
- 1
0
votes
1
answer
52
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:
...
- 123
0
votes
1
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41
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:
...
1
vote
1
answer
256
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 ...
- 113
0
votes
1
answer
70
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 ...
0
votes
0
answers
69
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, ...
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1
vote
2
answers
130
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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 ...
- 131
0
votes
1
answer
176
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 (...
- 464
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25
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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 ...
0
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1
answer
187
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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- ...
- 11
2
votes
1
answer
500
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 ...
- 99
2
votes
3
answers
574
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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 ...
- 165
3
votes
1
answer
253
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 ...
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6
votes
1
answer
2k
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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 ...
- 381
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2
answers
344
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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, ...
- 145
2
votes
1
answer
1k
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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, ...
- 123
0
votes
1
answer
279
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
...
0
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0
answers
127
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 ...
0
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1
answer
1k
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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 ...
- 11
0
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1
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827
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.
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1
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158
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
^
% ...
0
votes
3
answers
1k
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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 ...
2
votes
2
answers
3k
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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 ...
- 141
2
votes
0
answers
49
views
Private VLANs implementation
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, ...
- 812
6
votes
2
answers
3k
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?
- 125
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2
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2k
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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 ...
- 125
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1k
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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 ...
- 813
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2
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588
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 ...
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1
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499
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?
- 11
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votes
2
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400
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)> ...
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0
votes
2
answers
3k
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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 ...
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1
vote
1
answer
206
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 ...
- 461
1
vote
0
answers
75
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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 ...
- 11
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votes
2
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427
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-...
- 165
3
votes
1
answer
349
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 ...
- 145
1
vote
1
answer
80
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, ...
- 1,085
2
votes
1
answer
2k
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 ...
- 136
2
votes
1
answer
146
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 ...
- 464
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0
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175
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 ...
- 280
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162
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Cisco C3750 and PRTG netfllow
I have a core switch (backbone) of our network that broadcasts all the vlans to other switches. I am trying to configure netflow on the switch and link it up to a Netflow sensor on PRTG.
I followed ...
- 85
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votes
2
answers
927
views
Unable to ping between router and routed port on L3 switch. Why?
I've got an old Cisco 2811 connected to an old Cisco 4948 L3 Switch. I'm trying to teach myself a little more about L3 Switch implementation. All I'm trying to do at this point is get the router and ...
- 131
1
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1
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481
views
TCP handshake immediately RST [closed]
I'm trying to set up a modbus TCP connection on port 502 but get a RST packet immediatly. So the TCP connection handshake doesn't even succeed.
This is done on a windows machine on an ESX server.
The ...
- 213
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votes
2
answers
748
views
What does the Cisco HTTP client (help to) do on a switch?
While checking for vulnerabilities in one of our Cisco switches I came upon this: CVE-2019-12665.
Excerpt from the CVE:
A vulnerability in the HTTP client feature of Cisco IOS and IOS XE Software ...
- 103
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1
answer
235
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N2K-C2248TP-1GE question
We are working with Cisco 2960 and Cisco 4948 switches as our top of rack switches and we want to purchase some N2K-C2248TP-1GE , and connect N2K-C2248TP-1GE to our edge switches, (our edge switches ...
- 577
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1
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197
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Vlan Command Issues on Cisco Switches
I'm new to cisco equipment. I have GNS3 emulating an L3 switch whose image is "i86bi-linux-l3-adventerprisek9-15.5.2T.bin". I want to create a cable network with 802.1x and vlan authentication. For ...
- 113
1
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1
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723
views
`no ip bootp server` appear in `sh run`
My understanding on Cisco devices is if we put no command in the config mode, that particular line will be gone from sh run.
But I notice there is specific line in sh run with no ip bootp server ...
- 391
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vote
1
answer
107
views
VLAN Across Trunked CISCO 2960-S Switches
With reference to the above diagram: Is 10.124.124.141 supposed to be able to ping 10.124.124.161 if the setup is correct ? There is no router in-between, the idea is that the VLAN 215 spans two ...
- 141
1
vote
1
answer
232
views
Migrating Configuration - 3750G to 3750X
What is the best practices to migrate configuration from an older Cisco switch model to a newer Cisco switch model?
-I am not expecting to change any configuration, just simply want to be on the ...
- 681