LTM Maint. Page issue

What is your class name that contains the HTML? Is it named exactly maint_index_html? If so you can reference it using $::maint_index_html. Can you try this rule and see if it works for you?

    
  when HTTP_REQUEST {  
    
      Test the maint_index_html class  
     if {[info exists ::maint_index_html]}{  
        log local0. "\[lindex \$::maint_index_html 0\]: [lindex $::maint_index_html 0]"  
     } else {  
        log local0. "\$::maint_index_html doesn't exist!"  
     }  
    
       
      Service requests for files (URIs) from the maintenance page  
      Note that we always service these pages, even if the http_pool is up  
       
     set maint_prefix "/maintenancepage"  
     set maint_len [string length $maint_prefix]  
     set uri [HTTP::uri]  
     log local0. "redirect: [HTTP::uri]"  
     if { $uri equals $maint_prefix } {  
    
        HTTP::respond 301 "Location" "$maint_prefix/"  
    
     } elseif { $uri starts_with "$maint_prefix/" } {  
    
         Return the requested page  
        switch $uri {  
           "$maint_prefix/"             -  
           "$maint_prefix/index.html"   {  
              HTTP::respond 200 content [lindex $::maint_index_html 0] "Content-Type" "text/html"   
           }  
           "$maint_prefix/logo.png" {  
              HTTP::respond 200 content [b64decode [lindex $::maint_logo_png 0]] "Content-Type" "image/png"  
           }  
           default {  
              HTTP::respond 404  
           }  
        }  
        return  
     }  
       
      If the all members in the default pool are down, redirect to the maintenance page  
       
     if { [active_members [LB::server pool]] < 1 } {  
        HTTP::redirect "$maint_prefix/index.html"  
     }  
  }  
    

If not, can you check the /var/log/ltm file for any errors or debug?

Thanks,

Aaron