Switching

I am having an issue where 2 2960X-48FPD-L Switches in a redundant flexstack (stack port 1 SW1 to port  2 SW2 and port 2 SW1 to port 1 SW2) ring. At first running the 15.0(2).EX5 (and earlier EX3, and EX4) version IOS yielded all the ports on the sta...

Hi Everybody, I have Windows server 2008 R2 DHCP Server . All Scope Created by Department Name and All System Mac Address has been Reservation on His Department Scope. Now i am deploy Network Infrastructure. Router 2911 Core Fiber Switch 3850S-S (Fi...

Hello Guys, I have a Cisco 6503, there are 16 ports on module 3 and they've been set as trunk ports for Layer 2 switches' uplinks for quite long time. Recently I've noticed these trunk ports' VLANs are pruned.  Below is configuration of one of inte...

Hi I would like to create prefix list on my router running BGP with the ISP to only allow routs coming in from private networks. I will attach these to a route map and then reference in my BGP config. Are these the correct prefix list or do I need a...

Hi all, I have a stack with two WS-C3650-48TD and IPBase license. I have enabled ipv4 routing with a few SVIs (VLAN interfaces for a few low traffic customers) and I'm running OSPF. Yesterday, a DDOS attack was *routed* through the WS-C3650. At the...

Hello guys, 'I new here in the Forum and would like to post my first question: Where I work, my client has 3 switches model 3750x-48PS connected via cable stack. The problem is in the switch 3 of the stack the two doors giga3/0/21 and giga3/0/24,...

HI Team , Good day !!!! May I know how to modify speed and duplex under a working trunk interface : I am using the image of :  c2960-lanbasek9-mz.122-55.SE9/c2960-lanbasek9-mz.122-55.SE9.bin ( model : WS-C2960-24TT-L ). I have tried to modify the s...

Hello There! We are thinking on upgrading out core switches to Cisco-Meraki switches. I'm not 100% sure yet.  As of everything is life, there are advantages and disadvantages. I would like to know if you guys could tell the most relevant Cons and Pr...

Hello Everyone,I am working on one design and need support for connectivity between two core switches and router. As shown in the attached diagram, it has two 4506E core switches and 2921 router which is connected to the internet. I need idea how the...

We have a pair of 6509 switches in our data centre and I have recently noticed a routing issue with one of the switches. We set up a new VLAN in our data centre dedicated for data replication between our primary and secondary data centres. What we no...

Hi all, I need some help and clarification about upgrading license from evaluation to Advamced Enterprise Service on Cisco ISR 3925. The thing i have done is for testingt some feature i have activated the Evaluation license by enabling datak9 feature...