16 posts tagged with "routing"
Two upstreams, real control over traffic. Outbound steering with local-preference, inbound steering with AS-path prepend, MED, and provider communities, and why inbound is always the harder half.
The four MANRS actions turned into real config. Building prefix filters with bgpq4, enforcing AS-path sanity, deploying BCP38 anti-spoofing with uRPF, and keeping your PeeringDB and IRR records honest.
Origin validation only works if your routers have fresh, trusted ROA data. How to run Routinator, feed it to BIRD, FRR, and IOS-XR over RTR, and roll out invalid-dropping without blackholing yourself.
How an internet exchange route server actually works, and how to build one with BIRD 2. Transparent AS_PATH, per-client filtering, RPKI validation, and the BGP communities members use to control who they peer with.
Run routing protocols over VPN tunnels on VyOS. Covers OSPF over GRE/IPsec, BGP over WireGuard, tunnel interface selection, and why routing over tunnels requires careful planning.
Configure BGP route dampening on VyOS. Covers dampening parameters, penalty calculation, route suppression, reuse thresholds, and why dampening prevents unstable routes from destabilizing your network.
Configure ECMP on VyOS for route-level load balancing. Covers equal-cost paths, multipath BGP, hash algorithms, troubleshooting uneven distribution, and why ECMP is simple but requires understanding.
Configure route leaking between VRFs on VyOS. Covers import/export policies, selective leaking, shared services, and why route leaking provides controlled cross-VRF connectivity.
Master BGP communities on VyOS. Covers standard, extended, and large communities, common use cases, community-based filtering, and why communities are the language networks speak.
Debug policy-based routing on VyOS. Covers rule evaluation order, mark verification, table inspection, common misconfigurations, and why PBR debugging needs systematic verification.
Using VRF on VyOS for network isolation that goes beyond VLANs. Covers VRF creation, inter-VRF routing, route leaking, firewalling between VRFs, and maintaining a clear mental model of your segmentation.
Real-world BGP route validation using RPKI and IRR on VyOS. Covers validator setup, policy storage, prefix validation workflow, and why filtering is a process, not a single configuration.
BGP fundamentals on VyOS using FRR. Covers eBGP/iBGP setup, prefix-lists, route-maps, communities, max-prefix protection, and why BGP without filtering is an incident waiting to happen.
Practical OSPF configuration on VyOS. Covers areas, passive interfaces, authentication, MTU issues, and the small details that cause OSPF adjacencies to fail silently.
Configuring reliable multi-WAN failover on VyOS with proper health checking. Covers dual ISP setup, weighted load balancing, SLA monitoring, and why failover without tracking is false confidence.
How to route specific traffic through different gateways on VyOS. Covers routing by source, destination, domain, and application with real-world examples like split-tunnel VPN.