My cisco C4500-x switch is not supporting GLC-T SFP transciever. the iOS version of the switch is (cat4500e -UNIVERSALK9-M), Version 03.08.01.E. I check the compatablity of the SFP with the switch and found out the iOS version is too old to support t...
Hi there. I'm trying to figure out why my dhcp server is not working. Everything works statically and it works in the same switch but not in the other switched VLANs. Help please?
The IPs of the machines behind the core network are assigned by DHCP via the DHCP server, not the pt-empty router. There are 2 VLANs that do not communicate with each other (still behind the core network): VLAN 10 & VLAN 20. The printers serve only t...
Hi,I have one switch in each DMZ zone. Each DMZ VLAN has the default gateway on the firewall.I am wondering what is considered the best practice:Connecting DMZ switches directly to the firewallOrConnecting DMZ switches via the core switch (L2 only) t...
Hi all, I facing issue with a customer that want to upgrade iOS for Catalyst 3850-48T-L Switch.Current version: 03.06.06Eupgrade version: 16.09.06.SPA.bin. Actually I'm curious about downloading iOS without getting service contract.So is it safe to d...
I have customer that has a special system where the end devices don't have MAC addresses nor IP addresses. The system was previously connected via direct cables (fiber and ethernet). The customer has now requested to connect these devices to Cisco L2...
Hi, We have configured the trunk port Cisco C1000 switch with C1000 Switch. All is ok. But when we have unplugged the uplink cable after than upstream host machine drop the ICMP. We have checked the interface logging status by console cable, there ha...
Hi there : i have a Cisco catalyst 2960-x sires 24 ports switch .. this is a brand new item purchased the last week from local vendor . whenever i try to Putty this error message is shown as attached in the picture : would you please tell me what t...
Trying setup a 3550-48.The following command::int fa0/1switchport mode dynamic desirableIs responded to with:Command rejected: Fa0/1 not a switching port.Command rejected: Fa0/1 not a switching port.
Hello.My WS-C2960CG-8TC-L is running on 12.2(55r)EX11 and I would like to perform a firmware upgrade. I'm using the command "archive download-sw /reload" , but the switch says "Error: The image in the archive which would be used to upgrade Error: sys...
when i get a blank output of the show int trunk, this means that the link is down. But how should i fix that besides reentering all the code again? Is there an easy way? Also, how can i see, when using vlans, which port has which vlan connected? show...
Hi,someone can help me?I have Cisco 1841 with WIC1T board, SerialI have Cisco 2921 with WIC2T board, Smart SerialSomeone know which is code of Cross Cable to connect together?And is it possible to connect second port of WIC2T to other router?Thank yo...
HiI need to get stack two new switches to be connected between the perimeter firewall and datacenter firewall also will use some interface for DMZ.I have these two options:-2 stack C9200-24P (24 x 1G + 4x 10G SFP+)-2 stack C1300 (12x 10G + 12x SFP+)A...
A few days ago, I was contacted by our security department reporting several IP cameras were down. Upon inspection, I discovered 7 ports in an err_disable state. Looking at the logs, I found the following entries:Nov 26 13:47:11 PST: %PM-4-ERR_DISA...
Hello all, Refer to that table 1: PCP value 0 = Background and PCP value 1 = Best Effort As concerned Wireless QOS, it can be uniquely defined on each wireless LAN, using the four trafficcategories listed bellow : Regarding this table above, 802....
