We have a 2960S stack (2 switches) in a remote DC that is getting very close to hitting vlan limit (255) - Any recommendations on a replacement would be greatly appreciated.
Currently using 48 ports (Including 3 SFP ports)...So requirement would be similar port density to what we currently have (Copper 96, SFP 8), but with a lot more vlan's...Im not a huge fan of the 2960's due to small buffers....this may have improved in the latest 2960 range?
The switch is quite busy...peak traffic 400Mb+/sec....so we are pushing the limits of this platform no doubt.
Switch is currently only doing L2.
Certainly not opposed to moving from a 2 switch stack -> 2 individual switches....
We are a service provider - we have multiple connections(AGG's) to carriers, and each tail is a new vlan that is presented to us via these AGG's? Some EC's have 50+ tails at this POP....why is having more than 100 vlans "not good"?
Do you prune your VLANs or do you enable ALL your VLANs to all your switches? I mean, if your switch has, say, 48 VLANs, do you just configure and enable only 48 VLANS. You don't enable all >200 VLANs.
We only configure the vlans that are active services on this switch stack - i.e. We have over 200 active services coming in via a number of carrier aggs(as vlans) on this switch stack, which are then trunked to a router for L3.
We obviously need to upgrade - Just after some recommendations....Are the "new" versions of the lower-end switches any better with buffer size, or is the 4500/4900 range the best option?
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
I also recommend the 4500 series. 4900 are also better "better" than a 2960/3560/3750 series. Both might also be better, regarding buffering, than the newer 3650/3850 series too.
BTW, recently, I had to deal with a 3750X with a bunch of iSCSI-SAN hosts - had lots and lots of interface drops. (Operative word is had - figured out buffer settings that nearly eliminated drops [with QoS enabled]).
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...