[c-nsp] PAUSE vs PFC for loss-less traffic?

2014-03-09 Thread Mathias Sundman
There is a lot of talk about how PFC makes Ethernet loss-less and suitable for FCoE or ISCSI. My question is, for single-type-of-traffic interfaces, for example ISCSI arrays connected to a Ethernet switch. Why doesn't traditional PAUSE based flow control give the same level of loss-less performance

Re: [c-nsp] Copper SFP with ME3600X

2012-12-10 Thread Mathias Sundman
On 12/10/2012 08:23 PM, Nick Hilliard wrote: On 10/12/2012 19:12, Lobo wrote: Hi everyone. Been having a hard time trying to get a copper SFP to work on our ME-3600X-24TS-Ms. According to Cisco documentation, the GLC-T SFP is supposed to be supported on one of the fiber ports. However every Ci

[c-nsp] Redundant interDC FC-links with different latency

2012-11-29 Thread Mathias Sundman
I have a customer who intends to inter-connect two pairs of FibreChannel switches (Cisco or Brocade) between two DCs, and will be using Transmode 4G FC Transponders to light the black fibers. The two black fibers are 25km and 70 km. The distance can be handled with the line optics in the Trans

[c-nsp] Need for large buffers for 1-to-1 forwarding?

2012-11-21 Thread Mathias Sundman
We help customers "light" fibers by terminating them with simple switches so the customer can have a monitored 1G or 10G circuit between two sites using dot1q-tunnel to transparently pass customers VLANs. As we only provide the customer with 1 client port on the remote device, there is only on