Switching

Hello, we have a new cisco catalyst switch with SFPs. When inserting the SFPs we receive the message and the port doesbad crc notbad crc come up. %GBIC_SECURITY_CRYPT-4-VN_DATA_CRC_ERROR: GBIC in .... has bad crc SFPs are from Cisco, too -> mgbsx1  W...

Hi Experts,  I did "pnpa service reset" on WS-C2960X as a preparation for PnP. After reload, switch get the IP from DHCP server but not responding to telnet but ssh and asking for password. PnPa Service Reset brings device to factory default but seem...

I didn´t mean to convert the traditional to smart, mas now I have: "Status as Converted". Is there anyway to fallback and use the PAK in regular way? Thanks, Cleber  

Hi All, C9200  Etherchannel --> C9200 at the same siteWe have layer 2 Vlan setting (Vlan 100 - 106) + RPVST spanning tree. SwitchportSW1: Vlan 100 - 106 Root Primary SW2: Vlan 100 - 106 root secondaryEtherchannel Trunk mode (allow 100, 101) Active Ac...

Hi,I have this c3750v2 with a corrupted IOS and was not able to boot. It goes to the "switch:" prompt when I power up the switch.How do I re-upload the IOS back to this switch? Can I do it via TFTP? The Cisco old doc only mention about xmodem transfe...

i have a problem.i have configured spanning tree on my 2 L3 switches but i don't see the interface per vlan . i only see one interface instead of seeing all the interfaces connected to the switch. There is a photo attached to explain better Thanks 

Anyone can tell me the upgrade path from 2.4.0.94 to image_tesla250_hybrid_2.5.8.15_release_cisco_signed.bin?Wondering if it will go well just copying the 2.5.8.15 file to the switch and doing a Swap Image will just work or if there is an interim ver...

Hello Everyone, We could see  there is a packet loss to the access switch. I will say the setup below. Please help me to fix this issue. Core switch(6504) [Gi1/3/8 & Gi2/3/8]<--> [Gi1/1/1 & Gi1/1/2] 3850 Access Switch[Gi1/0/48] <--> [Gi0/47]Downlink ...

Hi There,I'm using catalyst 3750, but I'm not able to use SSHError message showing :Unable to negotiate with 1X.XX.XXX.XX: no matching cipher found. Their offer: aes128-cbc,3des-cbc,aes192-cbc,aes256-cbcI have generate rsa key (please see the image o...

I have make a dhcp pool on a L2 switch for vlan 100. and my devices from vlan 100 are connected to a L3 switch and the L3 switch is connected to the L2 switch which is the dhcp server but when i do a dhcp request from a Pc on vlan 100 that is connect...

Hello I have problem with loop guard and flapping port.Short info about my network .I have 44 switch connect in spanning tree MSTP.  I was configure 3 instances .I deleted the ip switch addresses and changed the vlan names. Vlan X is from instance 1 ...