Hi I wanted to see what is the upgrade process from my RB450G (mipsbe)(6.34.1) to the latest one, Can I just upgrade to the latest version routeros-mipsbe-6.42.npk or do I need to upgrade to different versions in between
No, simply upgrade directly to new one. You can do it from Webfig or Winbox, click on “Check for updates”

Thank you normis.
I have done a Check For Updates and got back a ERROR: could not resolve dns name. I have an internal DNS server address configured. I may need to add an external one like 8.8.8.8 to get resolve the dns name.
For the automatic update, you need to be able to resolve upgrade.mikrotik.com
normis@machine:~$ host upgrade.mikrotik.com
upgrade.mikrotik.com is an alias for download.mikrotik.com.
download.mikrotik.com has address 159.148.172.226
download.mikrotik.com has address 159.148.147.204
download.mikrotik.com has IPv6 address 2a02:610:7501:4000::226
download.mikrotik.com has IPv6 address 2a02:610:7501:1000::196
Thank you normis. great help
Hi this morning I went about upgrading a spare RBG450G router with version 6.42.1 and used the backup from an existing RG450G router running 6.34.1 which is working ok. Then I swopped over the connections in to the new router, only to find that it wouldn’t connect to one of our network segments which sits behind a CCR1036 running 6.23, and had to regress the change and put the old router back instead. I noticed that on the new software version there are confige changes
/interface bridge
add fast-forward=no ****name=“Local Network”
add fast-forward=no name=loopback
/interface bridge port
add bridge=“Local Network” disabled=yes interface=“ether2 - Internal LAN”
add bridge=“Local Network” disabled=yes interface=“ether3 - N/A”
add bridge=“Local Network” hw=no interface=“ether1 - Backbone To Blade Router”
add bridge=“Local Network” disabled=yes interface=“ether4 - DSL”
add bridge=“Local Network” disabled=yes interface=“ether5 - DSL”
The items in bold and in italics were added to the config by upgrading to the latest software version. Could these be causing the issue.