What is DHCP Server (Dynamic Host Configuration Protocol)

UPGRADING EOS in the ARISTA Switches

UPGRADING EOS in the ARISTA Switches: EOS is the Firmware for Arista Switches whereas IOS for Cisco. This blog post shows the detailed procedures to follow and to upgrade the EOS in the Arista Switches. This Post was supports for any platform or the Version you are going to upgrade in the Arista Switches. This Post was divided into three parts : Pre-Upgrade Process Upgrade Process Post-Upgrade Process PRE-UPGRADING-PROCESS: 1 1) Check the Upgrade Path tool by clicking the below link. https://www.arista.com/en/support/mlag-portal/mlaglist and confirm it is in mlag issu compatible 2) Check if the STP agent is restartable by giving the command switch-1# show spanning-tree bridge detail | grep agent Stp agent restartable : True NOTE : A switch can continue supporting MLAG when its peer is offline if the STP agent is restartable. When one peer is offline, data traffic flows from the devices through the

VPC in Cisco Nexus and Failover scenarios.

Etherchannel is the technology that binds multiple physical links in to the single logical link in the switch which fools the spanning tree to be visible as a single port id instead of multiple physical ports id's this causes all the ports to be in the forward state to pass the traffic without creating the loops in the network. We can configure the etherchannel either through static or dynamic. Static ether channel works by manually binding the physical ports into one logical port, this is not recommended because it is not aware the state of the other end physical ports whereas LACP (Link aggregation control protocol) and PAGP (Port aggregation group protocol) are the two dynamic protocols. LACP is the IEEE standard and the PAGP is the Cisco proprietary protocol, LACP is the most commonly used protocol in the networks it works by negotiating with the other end of the ports and would form the portchannel once the set of parameters match on both ends. We can bind max 16 ports to a si

FORTIGATE ACTIVE PASSIVE UPGRADE

FORTIGATE ACTIVE PASSIVE UPGRADE : This blog post shows the detailed procedures to follow and to upgrade the firmware in the Fortigate Firewall. This Post was supports for any platform or the Version you are going to upgrade in the Fortigate Firewall This Post was divided into three parts : Pre-Upgrade Process Upgrade Process Post-Upgrade Process PRE UPGRADE STEPS: 1 1) Go to the below website and check the Upgrade Path https://docs.fortinet.com/upgrade-tool 2) Next Login to the Fortigate Console and check the HA Status ( it is to be In sync and higher Priority enabled for the required primary device) 3) Login to the Console and give the command Config global – get sys ha status Also check session pickup is in enable to avoid session interruptions in failover. 4) Download all the Firmware’s and the md5 files in the list and check with the software MD5sum.exe to avoid the download errors. NOTE : Must and should configuration backup have t

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