Switching

 I have a problem. I have 2 4451's connected to a Layer 2 switch via BDI interfaces and running HSRP on the router. (see attached drawing). On the routers I also have  8 port NIM cards. I have a PC plugged into one of the NIM card ports and need to c...

When using a ISR 4221 as a console device. I get the following on one of the 3850's and it will not stop scrolling..  I even removed and added back. I do see a lot of noise!!.. any suggestions would be helpful.   * 0/1/6    8 TTY   9600/9600  -    - ...

Hello there,  I recently got a new project where I have to configure Cisco Nexus 3048TP switch. The company has bought these used switches and when I fire up the device it says :   loader>   I have copied kickstart and standard image to a USB from on...

Hi guys, I'm wondering why DHCP Snooping inserts the Option 82 at all ?  The only thing that comes to my mind is that DHCP Relay functionality is mutually exclusive with DHCP Snooping on L3 switch.  This is where DHCP Snooping comes in handy if the...

We have a 6509 core switch that connects all of your schools together via fiber. In the past, the group of buildings near the data center with this core switch were on the same subnet as the datacenter, which did cause some problems. We now have set ...

Hi, I have " C3750E-UNIVERSALK9-M " 9 switches in stack and am using Radius server for authentication.when ever i am using authentication method my end usres are unable to get Ip address.can any one suggest on this.

Hello, customer has 3850s with IOS-XE 3.7.5 in access-layer. The access ports are configured with 802.1x, ip device tracking and dhcp snooping.We wanted to increase security by adding arp inspection to client vlan 160. We had to remove DAI because of...

In a little bit of a brick wall.  I need to set up a router directly to a laptop using a VLAN for a lab.  I created the VLAN and encapsulated using dot1Q but the vlan is still in a down state.    int vlan 70int g0/2.70encapsulation dot1Q 70   I issue...

Hi all.I have a 2 member 3750-x switch stack that was upgraded to 15.2 today via CNA. All the files were transfered and expanded correctly and it got to the step where the switches needed to be reloaded but on reload they froze.I connected a console ...

Hello all,   I have to connect two SG220 series switches. On the first switch (S1) I have created 3 vlan (vlan10, vlan20 and vlan30). On one of the port I connected Mikrotik router with the same vlans and DHCP pools for each of them. On the S1 I conf...

Hello Experts, I am facing with MACSEC configuration....looks like configuration is correct but still port is unatuth.. errror: %CTS-6-PORT_UNAUTHORIZED: Port unauthorized for int    port configuration on both side:   interface GigabitEthernet3/0/24 ...

Hi Guys,   I have stack switch the power is not stable on them and I want to show the technician the logs about switch restarted time...is there any way to know that?   Thanks for all   MK saeed

Greetings.   We have a relatively recent install, based around N9Ks (9504s and 9300s). Our integrator turned on UDLD aggressive as default before handover, and it's causing us issues - ports go into err-disable too often. We want to turn it off, glob...

Folks,                 I have the following command enabled on a 9300. I see portfast enabled on the access ports but i do not see bpduguard. Any ideas?   spanning-tree portfast bpduguard default