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I'm pulling my hair out on a simple issue, and I could use some advice.   Thank you, in advance.I've got a core 4510 switch with 2 12-port 10GE SFP+ modules and my closet has a stack of 3 3850-48p with 2 4-port C3850-NM-2-10G  modules.I'm using 4 SFP...

Hi All,I am not sure if I should be posting here but I could not find an answer anywhere. I am currently studying CCNA3 Chapter 5 and I cannot get my head around something regarding the OSPF DR/DBR election process. The course teaches us that the ele...

hello, i have cisco 887vaw with pppoe dialer  im trying to create traffic shaper per source and destination and its work only if the class-map is Associates with access-list any to any. when im add any specific source/dest it does not work.   my conf...

Hi I am studying for my cisco exam and I have run into some commands that I haven't see before and would like some assistance with understand them please. For example "boot-start-marker, boot-end-maker

Hi Team,I recently purchased WS-C2960-24-S switch and I wanted to ask the following questions: 1. What is the difference between NVRAM, ROM, flash-simulated non-volatile and each additional memory type and how each memory type is defined on the syste...

I have 2600 router.int FastEthernett 0/0 retrieve IP from DHCP.How can internal IP from VLAN 10,20,30 access Internet through Int FastEthernet 0/0i try ip route to FastEthernet 0/0 but can't internetBelow is the config,interface FastEthernet0/0 ip ad...

Good day,We have an issue here onsite where the VOIP phones leases aren't being 'released' back into the available pool once the phone flips over to the voice vlan.They show in the scope as 'Txxxxxx' and due to the site having so many phones the ip c...

hi all,i'm trying to configure a few 3650s for PVLAN but it seems it doesn't support it.it's already configured for VTP transparent mode.i thought 'newer' switches should already have this feature.anyone can advise if i need to upgrade IOS or is it a...

I have dot1x implemented on my cisco 4500e using a windows 2008 NPS server. I'm noticing that when a endpoint fails to authenticate it doesn't reattempt unless I do a shut no shut. Is there a dot1x command that you can set the default re-authenticati...

Hi, I have configured ARP inspection along with DHCP snooping.All the computers are getting the IPs properly and building the snooping database. but once I disable and enable the network adapter, it starts discovering for IP address, in that process ...