Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


2 posts

Wannabe Geek


Topic # 193416 10-Mar-2016 11:54
Send private message

I have a UFB connection with a static IP address. I use a Fortigate firewall connected directly to the ONT - the firewall establishes the PPPoE connection so no need for a separate modem.

 

The Fortigate also supports failover to a secondary WAN connection if the primary WAN connection fails. I have configured the Fortigate to ping the assigned gateway address (222.152.45.105) to determine if the primary connection is up.

 

The problem I have is that several times recently the assigned gateway address has changed (ie: today it changed to 125.236.192.9), the ping to the old address fails and hence the health check causes the firewall to switch to the secondary connection. I have to reconfigure the health check with the new gateway address before the ping succeeds and the health check returns to normal.

 

Question: Is it common for the gateway address associated with a UFB static IP to change? Its happened 3 or 4 times in the last few months.

 

Would it be better to not ping the gateway, but instead ping something more static - such as 8.8.8.8? I assumed pinging the gateway would be less likely to cause a false positive if other non-connection specific internet faults occur.

 

 

 

Thoughts?

 

Thanks,
Greg

 

  


Create new topic
3123 posts

Uber Geek
+1 received by user: 1665

Subscriber

  Reply # 1510509 10-Mar-2016 12:34
Send private message

I wouldn't have expected the gateway to ever change with a static IP.





Information wants to be free. The Net interprets censorship as damage and routes around it.

 

Thinking about signing up to BigPipe? Get $20 credit with my referral link.


652 posts

Ultimate Geek
+1 received by user: 183

Trusted
Spark NZ

  Reply # 1510517 10-Mar-2016 12:41
Send private message

Yes, it can change, and we do not guarantee that it will be stable.

 

We did some tidy up activity at around 3am this morning that was no doubt the reason that it changed for you.  The changes this morning may mean that it is now more stable (although that was not the main intend of the changes, it may be a side effect).

 

I'd be interested in hearing if it changes again, and what it changes to.

 

Dave.

 

 

 

 





My views are my own, and may not necessarily represent those of my employer.



2 posts

Wannabe Geek


  Reply # 1510551 10-Mar-2016 13:34
Send private message

Thanks cbrpilot for confirming this. (Pity the helpdesk analyst I spoke to didn't have any knowledge of changes made - in fact they claimed there were no changes made last night).

 

 

 

What do people normally do for monitoring the health of their WAN link?


652 posts

Ultimate Geek
+1 received by user: 183

Trusted
Spark NZ

  Reply # 1510735 10-Mar-2016 17:08
Send private message

I cannot comment on what others do, but your router dynamically learns that gateway address when the PPP link comes up.  If I were you I would seek to find out if there is a way of your connectivity monitoring to dynamically learn it.

 

Alternatively if you're only interested in whether the PPP link is up, you could just try pinging your own static IP. (i.e. the local end of the link).  This should work so long you haven't hard coded the IP into your PPP config (which we don't recommend).

 

Dave.

 

 





My views are my own, and may not necessarily represent those of my employer.

26472 posts

Uber Geek
+1 received by user: 6027

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 1510782 10-Mar-2016 17:56
One person supports this post
Send private message

Lias:

 

I wouldn't have expected the gateway to ever change with a static IP.

 

 

It might be static but it's still delivered over PPP - so a gateway can still easily change.

 

 


3123 posts

Uber Geek
+1 received by user: 1665

Subscriber

  Reply # 1510983 10-Mar-2016 23:10
Send private message

Care to elucidate for my benefit?

 

I'm not totally network clueless, I have a current CCNA, albeit I do know many consider them fairly worthless pieces of paper.PPP was part of the curriculum, but PPP assigned IP addresses (along with most things internetish in reality) isn't.

 

I imagined it worked very much like DHCP, and that a static IP on an internet connection worked much like a DHCP reservation, and you'd always get a (generally) static gateway for whatever subnet your assigned address is in. A 2 minute google and looking at the config of my own connection put paid to that, but I can't say I fully understand it. My 2 minute interpretation is that PPP assigned IP's use a host only subnet because they don't need to know where to send stuff, it just dumps everything down the PPP connection, and let's whatevers at the far end deal with it, but I'm still not clear on why this results in changing gateways?

 

 

 

 





Information wants to be free. The Net interprets censorship as damage and routes around it.

 

Thinking about signing up to BigPipe? Get $20 credit with my referral link.


1181 posts

Uber Geek
+1 received by user: 262


  Reply # 1510996 11-Mar-2016 00:09
Send private message

There may be multiple PPPoE access concentrators available (a role of the BNG) and it could depend on which one responds due to load balancing configuration. Although in this case it resulted from a logical network change.

 

 

Think of PPP encapsulation as a VPN rather than a LAN.

Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

N4L helping TAKA Trust bridge the digital divide for Lower Hutt students
Posted 18-Jun-2018 13:08


Winners Announced for 2018 CIO Awards
Posted 18-Jun-2018 13:03


Logitech Rally sets new standard for USB-connected video conference cameras
Posted 18-Jun-2018 09:27


Russell Stanners steps down as Vodafone NZ CEO
Posted 12-Jun-2018 09:13


Intergen recognised as 2018 Microsoft Country Partner of the Year for New Zealand
Posted 12-Jun-2018 08:00


Finalists Announced For Microsoft NZ Partner Awards
Posted 6-Jun-2018 15:12


Vocus Group and Vodafone announce joint venture to accelerate fibre innovation
Posted 5-Jun-2018 10:52


Kogan.com to launch Kogan Mobile in New Zealand
Posted 4-Jun-2018 14:34


Enable doubles fibre broadband speeds for its most popular wholesale service in Christchurch
Posted 2-Jun-2018 20:07


All or Nothing: New Zealand All Blacks arrives on Amazon Prime Video
Posted 2-Jun-2018 16:21


Innovation Grant, High Tech Awards and new USA office for Kiwi tech company SwipedOn
Posted 1-Jun-2018 20:54


Commerce Commission warns Apple for misleading consumers about their rights
Posted 30-May-2018 13:15


IBM leads Call for Code to use cloud, data, AI, blockchain for natural disaster relief
Posted 25-May-2018 14:12


New FUJIFILM X-T100 aims to do better job than smartphones
Posted 24-May-2018 20:17


Stuff takes 100% ownership of Stuff Fibre
Posted 24-May-2018 19:41



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.