Buy or Renew
Buy or Renew

Switching

Discuss Catalyst brand switches with peers and experts.
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
cancel
Start a conversation

Get 20% off switches when you combine Cisco solutions

 
Labels

Forum Posts

Start a conversation

Resolved! 2960 switch not loading the new IOS image

Hi-I'm not sure what I'm missing here but I've successfully loaded a new IOS (c2960-lanlitek9-mz.152-4.E6.bin), changed the boot statement, confirmed the next boot and then reload the switch. After reload it still winds up loading the previous IOS (c...

rwaeger01 by • Level 1
  • 31506 Views
  • 11 replies
  • 0 Helpful votes

%SIBYTE-DFC3-4-SB_EXCESS_COLL

Hello!Jan 19 20:57:46 MSK: %SIBYTE-DFC3-4-SB_EXCESS_COLL: Excessive collisions on mac 1 (count: 263)Jan 19 20:57:46 MSK: %SIBYTE-DFC8-4-SB_EXCESS_COLL: Excessive collisions on mac 1 (count: 268)Jan 19 20:57:46 MSK: %SIBYTE-DFC7-4-SB_EXCESS_COLL: Exce...

High CPU utilization on cisco 2060s

Hi,   I have using a switch cisco 2960s-48ts-l. the cpu utilization of the switch more than 95% every times.  There is no dynamic arp inspection in enable but still HULC DAI process about 45%.   How to stop this ?     thanks debabrata  

Debudas123 by • Level 1
  • 1380 Views
  • 14 replies
  • 0 Helpful votes

Resolved! 1:1 static NAT vs port forwardng.

Hi all, I understand NAT is taking 1 internal IP, translating it into a routable public IP to the internet when going out of the router public facing interface.While port forwarding is more for incoming traffic, whereby access to a pubic IP's port is...

SJ K by • Level 5
  • 30369 Views
  • 28 replies
  • 5 Helpful votes

ACL randomly stops working on 2960X.

I have a 2960X POE switch that I have used to isolate a server. I am using an ACL to limit user access to it and also have a backup appliance that needs to connect to the server to keep the backup's up to date. BUT... the backup server keeps losing c...

Tom.R by • Level 1
  • 2044 Views
  • 7 replies
  • 0 Helpful votes

2960XR IP SLA and Tracking

Cisco IOS Software, C2960X Software (C2960X-UNIVERSALK9-M), Version 15.2(2)E3, RELEASE SOFTWARE (fc3) Trying to accomplish the following on a 2960XR Takes this command: track 10 ip sla 11 reachability ip route 10.200.250.0 255.255.255.0 10.1.10.1 tra...

collinsjl by • Level 1
  • 1597 Views
  • 6 replies
  • 0 Helpful votes

Smart license questions

I am new to smart licensing.  So i have registered these switches 9500 switches. But I have few questionsWhat if they loose communication to cloud, would the device fall back to eval?If it fallbacks's to eval/expires, do we get a notification of any ...

raj-toor by • Level 1
  • 451 Views
  • 1 replies
  • 0 Helpful votes

Resolved! Understanding routing between VLANs

Hi there,I hope this forum is ok for posts like this in which I ask for clearance in a topic...So in order to send a packet between vlans i understand we need to change the switchport to trunk, But what is actually happening "behind the scenes" when ...

Resolved! 10G Not Working between Nexus 7K and 3850

Help needed! We have 7004 Nexus switch and 3850 switch(C3850-24S-S) with 10GE Network Module(C3850-NM-2-10G) installed. The Nexus 7004 has 1/10 Gbps Ethernet Module, N7K-F248XP-25E. We bought 2 SFP-10G-LR from OSI. And they both show up from the "sh ...

ccomkim by • Level 1
  • 1930 Views
  • 14 replies
  • 0 Helpful votes

Switch 3850 IOS 16.3.6

I installed a 3850 switch and it can not activate NTP, TACACS services from external servers and I can not telnet out L2 network. My connection is through routed port. Could you help me?Networking

View All
Review Cisco Networking for a $25 gift card