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UPGRADING EOS in the ARISTA Switches

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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                      :      ...
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OSI Model in Telugu

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Destination IP Address of DHCP

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When DHCP starts the client has no idea about the network it’s currently on. Some clients may store the IP address they were previously on and send this out with the Discovery and Request packets, but the network is not truly set up until after the server has sent it’s final Ack message. Because of this the server does not know the network’s true broadcast address, however there is an address mapped for this very purpose. 255.255.255.255 If you run arp -a you will see that every interface has the following mapping 255.255.255.255 ff-ff-ff-ff-ff-ff static This means that just like a networks broadcast IP this message will be transmitted to all network adapters on the local network segment. The DHCP server listens for messages heading for port 67 UDP while the DHCP client listens for messages on port 68 UDP Lets lake a look at a DORA sequence in Wireshark 148 16.564069 0.0.0.0 255.255.255.255 DHCP 342 DHCP Discover - Transaction ID 0xaccba128 149 16.5...
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