Cisco

Cisco networking tutorials covering IOS and IOS-XE configuration, platform features, and hands-on guides for routing, switching, and security across Cisco hardware and software.
134 posts
Latest posts
GLBP public

GLBP for Active/Active Load Balancing

J
GLBP (Gateway Load Balancing Protocol) is Cisco's load-balancing FHRP. AVG, AVFs, three load balancing methods, configuration, and when GLBP is actually the right answer.
4 min read
VRRP public

VRRP Explained: The Vendor-Neutral FHRP

J
VRRP (Virtual Router Redundancy Protocol, RFC 5798) is the vendor-neutral FHRP. How it works, master election, IP address owner trap, vs HSRP, Cisco IOS XE configuration, and tracking.
5 min read
MPLS public

Cisco MPLS Configuration on IOS XE

J
Cisco MPLS configuration on IOS XE: enabling MPLS forwarding, LDP, LDP-IGP sync, VRFs for L3VPN, and MP-BGP between PEs. With a complete PE config example.
5 min read
MPLS public

MPLS L3VPN with MP-BGP and VPNv4

J
MPLS L3VPN architecture: VRFs, Route Distinguishers, Route Targets, MP-BGP for VPNv4, the two-label stack, PE-CE routing, and the Cisco IOS XE configuration.
7 min read
MPLS public

LDP and MPLS Label Distribution

J
LDP (Label Distribution Protocol) distributes MPLS labels across the network. Discovery, session establishment, distribution and retention modes, LDP-IGP sync, and Cisco IOS XE configuration.
5 min read
EIGRP public

EIGRP Stub Routing for Hub-and-Spoke

J
EIGRP stub routing makes hub-and-spoke topologies scale. The five stub options, query suppression, DMVPN integration, and the production patterns for branch deployments.
5 min read
EIGRP public

EIGRP vs OSPF: When to Use Each

J
EIGRP vs OSPF in 2026. The technical differences, the convergence story, vendor reality (EIGRP is still Cisco-only in practice), and the design implications for new vs existing networks.
5 min read
EIGRP public

EIGRP Metric and K Values Explained

J
The EIGRP composite metric formula, the five K values and why never to change them, the 64-bit wide metric for modern interfaces, and how to verify metrics in show output.
5 min read
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