Dell & Pluribus Partner to Bring Netvisor to Dell’s Open Switches
A recent impact report from 451 Networks calls the move to port Open Netvisor Linux OS onto Dell’s Open Networking switches “great” for customers. Find out why.
A recent impact report from 451 Networks calls the move to port Open Netvisor Linux OS onto Dell’s Open Networking switches “great” for customers. Find out why.
Looking at https://tools.ietf.org/html/rfc1323 there is a nice title: 'TCP Extensions for High Performance'. It's worth to take a look at date May 1992. Timestamps option may appear in any data or ACK segment, adding 12 bytes to the 20-byte TCP header.
Using TCP options, the sender places a timestamp in each data segment, and the receiver reflects these timestamps back in ACK segments. Then a single subtract gives the sender an accurate RTT measurement for every ACK segment.
To prove this let's dig into kernel source:
./include/net/tcp.h:#define TCPOLEN_TSTAMP_ALIGNED 12
./net/ipv4/tcp_output.c:static void tcp_connect_init(struct sock *sk)
...
tp->tcp_header_len = sizeof(struct tcphdr) +
(sysctl_tcp_timestamps ? TCPOLEN_TSTAMP_ALIGNED : 0);
The Datanauts and Howard Marks serve up a buffet of storage topics, including the pros and cons of all-flash and hybrid arrays, the ins and outs of cloud and object storage, and what's up with Virtual Volumes.
The post Datanauts 012: The Scintillating Storage Smorgasbord appeared first on Packet Pushers.
Amdocs tells Tier 1s: Get with the program and deploy vCPE.
A 15% growth outlook might have been a little much.
DT, Vodafone, Orange, and Verizon tell production tales of NFV.
It is finally official, Juniper has extended their certification expiration from two years to three years. Originally Juniper certifications where active for 2 years, and then you had 1 year after that to renew. If you did not re-certify prior to the 2–year anniversary, you went into an inactive status for a year with your […]
The post Juniper Certifications now good for 3 years! appeared first on Fryguy's Blog.
Last week I ran two SDN workshops, and in both of them the participants were busy taking notes as I explained the intricacies of concepts like SDN, NFV and network automation, and tools like OpenFlow or BGP.
However, how often did you revisit notes taken at a presentation and kept wondering “what exactly was he trying to say?” … or felt like the training you attended was like drinking from a fire hose and you missed most of the good stuff?
You won’t have that problem during the Miami SDN/NFV/SDDC retreat.
Read more ... Customers get the freedom to make programming changes to their network orchestration software.