OSPF silent-interface

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When you want to interconnect 2 OSPF processes in static mode for design requirements or just temporary in a migration scenario you have to instruct routers to not receive routing update information and to not advertize networks to another router. By default when you start an OSPF process all interfaces of the router send Hello packets to discovery neighborships. To …

Layer 2 Traceroute

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There are some nightmares that could torment the life of an access network, one of them is the MAC FLAPPING. as a loop condition or sometimes rogue devices installation, you will spend your day chasing mac addresses around your network. this great function on switches firmwares can Help! On Huawei switches trace mac enable must be enable on all access …

Cisco Catalyst StackPower

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if you want to have a complete redundancy even from an electrical point of view, Cisco offers the StackPower solution (XPS). StackPower share the power supplies to all slots of a Cisco StackWise. In this example we create two PowerStack in a StackWise of 5. Below the configuration: Troubleshooting: Bye! .glitchlist crew

Routers diagnostics

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to make a complete deep diagnosis of your router one of the most complete tools is: Sometimes the generated file is asked by vendors when you open a Cisco TAC or a Huawei CASE. The output of these commands is very large so on Huawei you can add the filename option and export the file via TFTP, while for Cisco, …

Archive function Cisco 6500

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Little trick to automate save and export configs of your cores: time-period is how often the script, in minutes, is execute.write-mem command calls the archive script every time you save configs on the router. .glitchlist crew

802.3ad between Huawei AR2240 and Cisco 3750X

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IEEE 802.3ad is used to aggregate multiple link ethernet for increase the network speed and availability.You can configure Layer3 to Layer3 LACP or Layer2 to Layer2 Etherchannel, but sometimes you have to do more: Some routers like Huawei 2240 are only configurable in LACP Layer 3 mode but, for design requirements, the Core Switch (ex.: Cisco) have to be set …