100Gb Ethernet transceivers, modules and form factors on Cisco products

At the time of the 400Gb Ethernet interfaces introduction, here is a summary of the different form-factors, transceivers and modules available for 100Gb Ethernet on Cisco devices. As you will see below, there are many different types of 100Gb Ethernet transceivers. And each type have its own functional mode. In a next article, I will try to explain the differences between them and will give more details about the most common: the QSFP-28.

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Extending the LAN with a Meraki wireless mesh link

Meraki_Wireless-Bridge

Cisco Meraki access-points can operate as mesh repeaters, which allows them to extend the wireless network range. Since repeaters also support wired clients plugged into their wired interface, a repeater can be used to bridge a remote LAN segment back to the main network. This article explains how the LAN can be extended via a wireless bridge, including limitations and requirements. There are 3 supported designs for extending the LAN via wireless mesh.

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Meraki mesh networking tests

Meraki_Wireless-Bridge-3

Wireless mesh networking is included and enabled by default in every Cisco Meraki AP. The goal is to create a self-healing network that is resilient to cable and switch failures. But, how does it works exactly? How does an AP choose between the existing neighbors? How can we monitor the status and performances of a mesh link? And as it is enable by default, is it possible to deactivate this feature?

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How to add a switch to an existing Cisco C2960X stack without breaking everything

A Cisco C2960X stack can have up to 8 members, however there is only one master on the stack. Adding a switch to the stack without taking a few precautions can have disastrous consequences. Prerequisites First, all stack members must run the same Cisco IOS software image. The same means also the same feature-set. Then, not all software images are able to be part of a stack: Stacking is not supported on switches running the LAN Lite image. And finally, can we mix different C2960 series? Yes all C2960X models are…

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Cisco Meraki MX Static IP assignment via Dashboard

This morning, I received a notice about a Cisco Meraki MX firmware upgrade planned for a security appliance I have in my lab.   The message lists the new features: Layer 7 traffic classifications for VPN flow preferences Syslog export of AMP events Added support for using FQDNs in L3 firewall rule destination Threat Grid support for the MX60(W), MX64(W), MX65(W), MX80, MX90, MX84, and MX100 appliances Content filtering improvements Static IP assignment via Dashboard (via Appliance Status page) Device utilization reporting (via the new Summary Reports page) Performance, stability,…

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