SSH Tunneling – Remote Wireshark

Harvard's Widener Library, Cambridge, MA, USA Introduction SSH Tunneling is very useful for SSH Client and server to utilize remote and local resources over an established SSH session. Broadly speaking, there are three types of SSH tunneling such as: Local Port Forwarding — Make Remote Resources accessible on a Local systemRemote Port Forwarding — Make Local Resources accessible on … Continue reading SSH Tunneling – Remote Wireshark

5G Core PDU Session and QoS – Part 2

Brighton Beach, UK Introduction Part 1 of this article provides a quick overview of what is 5G mobile core network or 5GC. It covers SMF, AMF, PCF, QoS Flow, SDF, DRB, and AN_Tunnel and CN_Tunnels etc…. It also shows how a UE (User Equipment such as a 5G Smartphone) can establish a PDU session via a … Continue reading 5G Core PDU Session and QoS – Part 2

5G Core PDU Session and QoS – Part 1

Incheon, South Korea Introduction 5G is certainly the loudest buzzword in the networking industry for the past few years. Many carriers announced their 5G networks in 2019 but those 5G deployments were mostly based on 3GPP Release 15. The specification still missed out many important 5G’s features and services such as the new 5G Core … Continue reading 5G Core PDU Session and QoS – Part 1

Bell Lab’s Future X Network and Network Function Interconnect

Prague, Czech Republic Introduction The last major carrier network transformation happened in 2000s when carriers all over the world replaced their multiple network silos comprising TDM, ATM, Frame Relay, and IP etc… for their voice, video and data traffic by a single QoS-enabled networking technology called MPLS. The new QoS-enabled MPLS technology allows a carrier … Continue reading Bell Lab’s Future X Network and Network Function Interconnect

BGP EVPN and All-Active Multi-Homing Ethernet Segment on GNS3

Berlin, Germany Introduction BGP MPLS-Based Ethernet VPN or BGP EVPN (RFC 7432) offers more scalable, flexible (e.g., per flow and service load balance) and resilience (e.g., Multi-Home) Overlay layer 2 (L2) and layer 3 (L3) network services than the older TLDP and MP-BGP VPN based L2 and L3 MPLS network services designed in 2000s. BGP … Continue reading BGP EVPN and All-Active Multi-Homing Ethernet Segment on GNS3

MultiPath TCP VM and Network Function Virtualization

Doha, Qatar Introduction Many networking devices such as a smartphone has multiple network connections such as WiFi, and 4G LTE radio inside a device. RFC 6824 defines MultiPath TCP (MPTCP) protocol that can enable two devices each with multiple wireline and wireless network transports to increase their TCP throughput by dividing a single stream of … Continue reading MultiPath TCP VM and Network Function Virtualization

Extending Private Data Center to Azure Cloud – Part 2

Teotihuacan, Mexico Introduction In Part 1 of this article, I talked about network and system design issues related to scalability, redundancy and security for deploying a 3-Tier application in a private Data Center (DC). It is more a theory-only article. Parts 2 and 3 of this article are more hand-on where we will deploy this … Continue reading Extending Private Data Center to Azure Cloud – Part 2