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IPYE

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LACP and Link Aggregation: How 802.3ad Bundles Work, What Hashing Means, and a Linux Bonding Setup

LACP and Link Aggregation: How 802.3ad Bundles Work, What Hashing Means, and a Linux Bonding Setup

4 min read
IS-IS for a Small Network: Why Operators Choose It, Levels and NETs, and an FRR Configuration

IS-IS for a Small Network: Why Operators Choose It, Levels and NETs, and an FRR Configuration

4 min read
Protecting the Router Itself: Control-Plane Policing and Management-Plane Filters, with a Linux Example

Protecting the Router Itself: Control-Plane Policing and Management-Plane Filters, with a Linux Example

4 min read
Diagnosing Packet Loss: Telling Link Errors, Queue Drops, and Rate Limiting Apart

Diagnosing Packet Loss: Telling Link Errors, Queue Drops, and Rate Limiting Apart

4 min read
tcpdump and Wireshark Filters for IPv6: Practical Recipes and the Extension Header Caveat

tcpdump and Wireshark Filters for IPv6: Practical Recipes and the Extension Header Caveat

4 min read
IXP Basics for Small Networks: Route Servers, Peering Policies, and PeeringDB

IXP Basics for Small Networks: Route Servers, Peering Policies, and PeeringDB

5 min read
NetFlow, sFlow, and IPFIX for a Small ISP: Choosing a Flow Export and Reading It

NetFlow, sFlow, and IPFIX for a Small ISP: Choosing a Flow Export and Reading It

4 min read
Rate Limiting and Banning IPv6 Clients by /64 with nftables

Rate Limiting and Banning IPv6 Clients by /64 with nftables

4 min read
IPv6 Logging and Abuse Handling: Why the /64 Is the Unit

IPv6 Logging and Abuse Handling: Why the /64 Is the Unit

4 min read
GeoIP and Geofeeds: Getting an IPv6 Prefix Located Correctly

GeoIP and Geofeeds: Getting an IPv6 Prefix Located Correctly

4 min read
BFD Basics: Fast Failure Detection for BGP and Static Routes

BFD Basics: Fast Failure Detection for BGP and Static Routes

4 min read
ICMPv6 Type by Type: A Reference for What a Firewall Must Allow

ICMPv6 Type by Type: A Reference for What a Firewall Must Allow

4 min read
DHCPv6 Prefix Delegation Explained: How a Router Gets Its Own IPv6 Prefix

DHCPv6 Prefix Delegation Explained: How a Router Gets Its Own IPv6 Prefix

4 min read
IPv6 for Web Servers: Dual-Stack nginx and Apache, and How to Test It

IPv6 for Web Servers: Dual-Stack nginx and Apache, and How to Test It

4 min read
Dual-Stack Hygiene: Happy Eyeballs, MTU and Path MTU Discovery, and the ICMPv6 You Must Not Filter

Dual-Stack Hygiene: Happy Eyeballs, MTU and Path MTU Discovery, and the ICMPv6 You Must Not Filter

4 min read
Reading a Looking Glass and BGP Route Data to Debug an Unreachable Prefix

Reading a Looking Glass and BGP Route Data to Debug an Unreachable Prefix

4 min read
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