Help with iRule for redirect from abc.com to url abc.com/a/aasa/sss/

can you try this?

  if { [HTTP::host] eq "abc.com" and [HTTP::path] eq "/" } { 
    HTTP::redirect "https://abc.com/aaaa/bbbb/cccc" 
    return 
  }

i'm already use this iRule

if { [HTTP::host]] eq "abc.com" && [string tolower [HTTP::uri]] equals "/" }{ HTTP::redirect "https://abc.com/a/aaaa/aaaca/" return }

but - thanks a lot for help. big 10x!

You need to use the developer tools in the browser (or log responses in HTTP_RESPONSE) to see what's coming back from the server to cause the redirect loop.