Same URLS different CMS and server set up. Page Authority now 1

[daracreative]

We have moved a clients website over to a new CMS and onto a new server.

The Domain and URLs on the main pages of the website are exactly the same so we did not do any 301 re directs.

The overall Domain Authority of the site and the Page Authority of the Homepage, while having dropped a bit seem OK.

However all the other pages now have a Pagerank of 1

I'm not exactly sure what the IT guys have done but there was some re routing on the server level applied.

The move happened around the end of December 2014

And yes traffic has dropped significantly

Any ideas?

[ofw12387]

Hmm, if the url is exactly the same the PA value should not be affected.. so i think all thoses pages with PA 1 are somehow new urls

[RyanPurkey]

The specifics on this one would probably require page and domain level analysis, but you can take a look at your old site's sitemap in comparison to the new, old archive at archive.org, robots.txt, .htaccess, and any other factors regarding what most likely is some change in the URLs at a page level within the domain as Óliver has mentioned. It's highly likely that while the domain / homepage remained the same, URLs to the other pages have changed in some way.

[DirkC]

I would also do a full crawl of the site - to see if all internal links are still working properly. Visit your site with javascript disabled - check if you can still access all pages. Did you see any other problems after migration (less search traffic, decrease of positions in search results in Webmaster tools, more 4xx errors, crawl issues,...etc)

I agree with Ryan that without the site it's difficult to guess what the cause could be.

Dirk