Crawl anamoly issue on Search Console

[greenshinenewenergy]

Has anyone checked the crwal anamoly issue under the index section on Search console? We recently move to a new site and I'm seeing a huge list of excluded urls which are classified as crawl anamoly (they all lead to 404 page). Does anyone know that if we need to 301 redirect all the links? Is there any other smarter/ more efficiently way to deal with them like set up canonical link (I thought that's what they're used for isn't it?)

Thanks!

[david-johns-sheetlabels]

Did you keep the old url in webmaster tools?  With sitemap of old domain that redirects?  You should make sure that was submitted for crawl so google see's the 301's.  Also make sure you redirected all versions http, https, www, etc of old domain* to new https//: version.

Are the pages in fact 404 pages?  are they pages in your sitemap?  be careful too that they are not bad internal links.  Did you crawl site with moz?