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Category Archives: SharePoint

Slow Upload Performance

We were having issues where some PCs had slow upload performance over the WAN. The WAN link was a E3 (34Mbps) with round trip latency of around 50ms and was not congested. When uploading to SharePoint, some PCs would upload at between 150 and 250 KBps. Otherwise identical PCs would upload at over 1MBps. The [...]

SharePoint Calculated Column Formula to calculate CIDR

This formula takes a column called Mask and calculates the CIDR. It assumes that the subnet mask is valid. Note that if the column is called Subnet Mask this formula won’t work – it’s probably too long. ?View Code TEXT=IF(Mask="","",IF(Mask="0.0.0.0",0,0)+IF(Mask="128.0.0.0",1,0)+IF(Mask="192.0.0.0",2,0)+IF(Mask="224.0.0.0",3,0)+IF(Mask="240.0.0.0",4,0)+IF(Mask="248.0.0.0",5,0)+IF(Mask="252.0.0.0",6,0)+IF(Mask="254.0.0.0",7,0)+IF(Mask="255.0.0.0",8,0)+IF(Mask="255.128.0.0",9,0)+IF(Mask="255.192.0.0",10,0)+IF(Mask="255.224.0.0",11,0)+IF(Mask="255.240.0.0",12,0)+IF(Mask="255.248.0.0",13,0)+IF(Mask="255.252.0.0",14,0)+IF(Mask="255.254.0.0",15,0)+IF(Mask="255.255.0.0",16,0)+IF(Mask="255.255.128.0",17,0)+IF(Mask="255.255.192.0",18,0)+IF(Mask="255.255.224.0",19,0)+IF(Mask="255.255.240.0",20,0)+IF(Mask="255.255.248.0",21,0)+IF(Mask="255.255.252.0",22,0)+IF(Mask="255.255.254.0",23,0)+IF(Mask="255.255.255.0",24,0)+IF(Mask="255.255.255.128",25,0)+IF(Mask="255.255.255.192",26,0)+IF(Mask="255.255.255.224",27,0)+IF(Mask="255.255.255.240",28,0)+IF(Mask="255.255.255.248",29,0)+IF(Mask="255.255.255.252",30,0)+IF(Mask="255.255.255.254",31,0)+IF(Mask="255.255.255.255",32,0)) Note that if I was to do this again, I would probably just create a [...]