Persistent Route in Windows 7

Umm, a pretty decent topic I believe. Recently I was trying to figure out certain networking issues at a friend’s place and while running the command found a persistent route ‘0.0.0.0 0.0.0.0 gateway’ under the IPv4 settings and was sure that I didn’t add this entry at any point of time with my fresh Windows 7 professional installation. I wanted to see what will happen if I remove the same entry.

I removed the entry and everything seemed working perfect. I was still able to connect to internet, access other computers over the LAN etc. The problems started after the weekend when I took the laptop back to work and tried to connect to Microsoft exchange server using Microsoft Outlook (2007 standard edition)!

Outlook was so stubborn and shown me it was disconnected and I started removing the Java VirtualBox, ISA client etc and after going through few restarts still Outlook looked adamant and refused to connect to the exchange server. I checked with my colleague Sherin to confirm whether his 32bit Windows 7 professional has a persistent entry for the route and he reported yes.

I put the 0.0.0.0 persistent route entry back and bingo, Outlook got connected. The route entry 0.0.0.0 was a default entry against the default gateway for the session with Windows XP (if I am recollecting it correctly) and seems Windows 7 has made it as a persistent route with the latest enhancements!

If any Microsoft techies are reading this post (ever), would like to hear an explanation from them about this.

5 thoughts on “Persistent Route in Windows 7

    1. OK, just found out: When you assign your computer a static IP address, Windows puts a persistent route with
      Network address Netmask Gateway address Metric
      0.0.0.0 0.0.0.0 Default

      If you delete it, your internet won’t work. To get it back, simply go in to your network adapter settings and put your static IP info (IP, subnet mask, Default Gateway IP) back in.

Leave a Reply to Joshua Richards Cancel reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.