Switching

Hello,        i am preparing a proof of concept for a customer who wanted to implement IPv6 network.I want to use DHCPv6 with OSPFv3 and have 4 routers.R1--R2--R3--R4I want to configure R1 as DHCPv6 server and all others with autoconfig (stateless DH...

hello,         although I am connecting by using to the cisco vpn client and obtaining an ip address 192.168.1.x I am still unable to access machines on the remote network and ping replies are replied back from the wan address of the 1721 router. I w...

i'm pretty sure that the system supports jumbo frame but cannot get it to work.we need all ports including the vsl links to pass jumbo framesdo we just add the global command --> system jumbomtu 9000does it also require a reboot of the switches?thank...

Hello,We're using 3750 and 3550 switches with 802.1X for authenticating devices to our network and I'd like to know how many times people try to connect unauthorised devices to the network.Ideally, I'd like the switch to send a SysLog message to our ...

I guess the subject says it all. We just installed two new 6509s with VSS running and on the second switch (standby), there are no MAC addresses. There are servers plugged into the 2nd switch and some of those are a single NIC. So, why on those ports...

Hi,Does anyone know if it possible to put 12 x Cisco TwinGig Adapter and put either 24 x GLC-SX-MM= or 24 x GLC-T=, or any combination of fiber and kopper SFP`s into this one?This model; WS-C3560E-12D -S Best Regards Eivind Lund

I have a single link into the gig eth port of a sup 720 via fiber SFP, and pings going through that link take over 9ms on average (often over 10ms).  In other words, if pinging something that switch directly via the Sup720 gig port, pings take about ...

I have a new Internet Connection (my 6513 will be a Internet Router) using 10GigE connection.  The port is up and linking at 10Gig.  I have my ip and the other 'side's' ip address.  My question is what are the advantages disadvantages to the followin...

I recently had a 2621 router that was hanging up at 100% cpu utilization when large data files were transfered across the network.  I replaced the router with a spare 2621 and the problem went away.  I decided to play around with the problem router t...

Hi,I have eg. 61.1.1.0/26 public ip subnet provided by our ISP with 3 firewalls behind my internet router cisco 2851. My requirement is to priorotize say 3 Mbps bandwith (at any given point of time) out of 8 Mbps to one specific public IP eg. 61.1.1....

Hi all,please see picture attached. This is my topology and I would like to simulate two independent circuits with OSPF routing. Primary routing path should go thru SW1 and in case that SW1 will fail (for example power off) so OSPF should find second...

Hi,I created a mac based acl and applied to ports of  catalysts 3750 but any one not in this ACL below is also working and can get network accessAny idea what the issue is?Extended MAC access list Test    permit 001b.4f6f.0000 0000.0000.ffff any    p...