Network Engineering

SEPTEMBER 12, 2023

Starting from the following network topology: Internet ISP Cable Router Firewall Router rest of the network / multiple VLANs (port forwarding) | DMZ I had to expose two VLANs over the internet through VPN for two groups of users.

VPN 130

VPN Server Routers Port 130

The Network DNA

JULY 5, 2024

EVPN provides several benefits over traditional Layer 2 VPN technologies, such as Virtual Private LAN Service (VPLS). VXLAN EVPN Basic Topology EVPN Route Type The EVPN control plane advertises the following types of information: Ethernet auto-discovery (AD) routes are route type 1.

IP Address 52

IP Address Ethernet Advertising Unicast 52

Kentik

MARCH 19, 2020

This could mean the users are saturating the internet connectivity or that they’ve saturated the LAN (or maybe WAN). If the VPN gateways cannot generate flow or Syslog with traffic, the next richest data comes from the edge routers or switches near the VPN devices. These devices can send NetFlow, sFlow, or other flow types to Kentik.

VPN 69

VPN Network Networking Gateway 69

Network Engineering

JANUARY 24, 2025

RFC 7454 ( "BGP Operations and Security" ) says: When a network is present on an IXP and peers with other IXP members over a common subnet (IXP LAN prefix), it SHOULD NOT accept more- specific prefixes for the IXP LAN prefix from any of its external BGP peers. 22 while receiving and accepting 10.81.83.0/24

LAN 130

LAN Routers Topology Internet 130