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Afroz Ahmad
  • ByAfroz Ahmad
  • OnJanuary 23, 2013
  • InData Center, Nexus 7000
  • 8 Comments
  • Read Time4 mins

Cisco Nexus 7000 User Accounts and RBAC

This exercise has been done on Nexus 7010 chassis with the following pieces installed:- Dual supervisor modules, dual power supplies, dual system fans, dual fabric fans, and three fabric modules per chassis. One 48-port 1 Gigabit Ethernet I/O module per…

Read MoreCisco Nexus 7000 User Accounts and RBAC
  • ByAfroz Ahmad
  • OnApril 23, 2012
  • InCCDE, CCIE R&S, FHRP, Routing and Switching
  • Read Time27 mins

GLBP Details, Configs and Load Balancing Tests

GLBP Details

What is GLBP and Why do we use it? GLBP stands for Gateway Load Balancing Protocol and it is a Cisco proprietary First Hop Redundancy Protocol that attempts to overcome the limitations of existing redundant router protocols by adding basic load…

Read MoreGLBP Details, Configs and Load Balancing Tests
  • ByAfroz Ahmad
  • OnJanuary 22, 2012
  • InTroubleshooting
  • 5 Comments
  • Read Time3 mins

How to Copy Large “Show Tech-support” from Cisco Device Using Putty ?

How to Copy Large Show Tech-support from Cisco Device Using Putty

How to copy a large "Show Tech-support" output from a Cisco device using Putty. This is useful in case you are unable to copy the entire content of the output in one go.

Read MoreHow to Copy Large “Show Tech-support” from Cisco Device Using Putty ?
  • ByAfroz Ahmad
  • OnNovember 21, 2011
  • InBridging
  • 2 Comments
  • Read Time8 mins

Bridging LAN Over WAN

Layer 2 over WAN - Bridging

⚠️ Legacy Technology Notice: This article covers legacy Cisco transparent bridging with IRB using deprecated bridge-group commands from classic IOS. These commands do not work on modern IOS-XE or IOS-XR platforms. This content is preserved for historical reference and exam…

Read MoreBridging LAN Over WAN
  • ByAfroz Ahmad
  • OnNovember 3, 2011
  • InEigrp, Routing and Switching
  • 1 Comment
  • Read Time8 mins

EIGRP Neighbor: AS Number Unknown Explained

In the dynamic world of network engineering, troubleshooting is a timeless skill. While protocols evolve and tools advance, the fundamental principles of packet analysis remain critical. This post, originally penned in 2011, explored a classic, albeit niche, trick to discover…

Read MoreEIGRP Neighbor: AS Number Unknown Explained
  • ByAfroz Ahmad
  • OnOctober 31, 2011
  • InOER/Pfr
  • 1 Comment
  • Read Time16 mins

Cisco PfR/OER: Modern SD-WAN and Automation

Today, we revisit a foundational Cisco feature: **Optimized Edge Routing (OER)**, more commonly known now as **Performance Routing (PfR)**. In 2011, we explored how this “brain” could monitor network paths and intelligently route traffic based on real-time metrics like **jitter**,…

Read MoreCisco PfR/OER: Modern SD-WAN and Automation
  • ByAfroz Ahmad
  • OnOctober 29, 2011
  • InMulticast
  • Read Time10 mins

MSDP with BGP Address-family Ipv4 Multicast

Today we delve into the foundational architecture of MSDP with BGP IPv4 Multicast address-family. While initially published in 2011, the core principles of inter-Autonomous System (AS) multicast routing remain critical for understanding modern network designs. This updated post revisits the…

Read MoreMSDP with BGP Address-family Ipv4 Multicast
  • ByAfroz Ahmad
  • OnJune 18, 2011
  • InSwitching
  • Read Time8 mins

STP Root Guard: Automation & Best Practices 2025

Spanning Tree Protocol (STP) remains a critical Layer 2 defense mechanism, even in the age of advanced network fabrics. The STP Root Guard feature is an indispensable tool for preventing rogue switches from becoming the root bridge, thus maintaining network…

Read MoreSTP Root Guard: Automation & Best Practices 2025
  • ByAfroz Ahmad
  • OnJune 15, 2011
  • InSwitching
  • Read Time11 mins

3560/3550 Recovery Procedure

3560/3550 Recovery Procedure———————————— Connect a PC to the console port of the switch, Use a terminal emulation program such as Microsoft Windows HyperTerminal in order to establish the console session. These are the settings: Bits per second: 9600 Data bits:…

Read More3560/3550 Recovery Procedure
  • ByAfroz Ahmad
  • OnJune 14, 2011
  • InWeird Cisco Commands
  • Read Time9 mins

Cisco Configure Replace: Modern Use & Best Practices

As a network engineer, I’ve broken configs enough times to know the value of a solid rollback strategy. One of the most powerful, yet sometimes underutilized, commands in the Cisco IOS and IOS-XE toolkit is configure replace. While it might…

Read MoreCisco Configure Replace: Modern Use & Best Practices
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About Me - My name is Afroz, and I bring over 17 years of expertise as a Network Engineer. I've worked with multiple ISPs throughout my career and am currently engaged with one of the major ISP equipment vendors as a Network Designer.  - My Linkedin Profile

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