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Routing & Switching

Routing & Switching

BGP Private ASNs

Private autonomous system (AS) numbers which range from 64512 to 65535 are used to conserve globally unique AS numbers....
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Data CenterRouting & Switching

Cisco ASR 1004 L2TPv3 Pseudowire IPSec Encryption

Here I’m going to show a basic configuration on how to Encrypt a 10G link that has a stretched subnet....
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Routing & Switching

Cisco Cable Test Command

Cisco has a command that can run TDR tests on an interface. A TDR (time-domain reflectometer) is an electronic instrument...
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Data CenterRouting & Switching

Cisco Stack Port Channel Issues with MAC Address Persistency

When a switch stack forms a port-channel, the active stack member’s MAC Address is used for the LACP ID. The...
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Routing & Switching

Subnet Mask Cheat Sheet

Routing & Switching

Administrative Distances

Default Distance Value Table This table lists the administrative distance default values of the protocols that Cisco supports:...
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Routing & Switching

RIBs and FIBs

RIB (IP Routing Table) = is not used for forwarding and it’s derived from the control plane. Every protocol such...
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Routing & Switching

RFC1918 Private IPv4 Address Spaces

RFC1918 name IP address range number of addresses largest CIDR block (subnet mask) host id size mask bits classful description...
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Routing & Switching

Cisco CLI RegEx Regular Expressions

Some common ones I use:...
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Routing & Switching

Total Output Drops on Cisco 3750x Switches

I came across a bug in IOS 12.2(53r)SE2 and it shows up in other IOS versions, where the “Total output...
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Categories

  • Cloud
  • Code
  • Data Center
  • Laptops & Desktops
  • Load Balancing
  • Routing & Switching
  • Security
  • Servers
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  • VOIP
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AWS Azure Best Practices BGP Certificates CISA Cisco Cisco ACI Cisco ACS Cisco ASA Cisco ASR Cisco Catalyst Cisco CLI Cisco ISE Cisco Nexus Cisco Stack Cisco Wireless DDOS Design DNS EIGRP F5 HP IP Sla Kali Logging macOS Microsoft IIS Microsoft Windows Netflow Okta OSPF Packet Capture Palo Alto Palo Alto CLI PDF Ports PowerShell QOS snmp Splunk SSL Structured Cabling Troubleshooting VMWare
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Troubleshooting Palo Alto Microsoft Windows Cisco ASA PDF
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