Vodafone Sticky public IP Address

Hello forum.
Does anyone have Vodafone (residential) Broadband, using their Ultra Hub?
I have had an installation that I've had a few stability issues with so I have a BQM set up.
Thing is, the public IP address seems to have changed at least twice in the space of a month. I know it isn't a fixed IP address, but it should be sticky enough to stay the same for a long time , should it not? Anyone have any ideas why it might change more frequently, or know of any configuration on the Ultra Hub that might affect the stickiness of the lease?
Any help much appreciated

You can’t really complain, it isn’t static.

As to why it’s changing, well are the issues you mention causing dropped sync ? If so, there’s your answer.

Thanks for responding Zarjaz.
To be fair I wasn't complaining, just looking for answers.
If by "dropped sync" you mean a total loss of connection between my router and it's gateway or whatever is the next device up the public network, wouldn't it usually be served the same sticky address when it reconnects? I only have the BQM to go on at the moment and it goes from a very stable graph for a period of time to 100% packet loss which seems to be the point at which the IP address changes . Any advice on what else I can look at around the time that it drops would be very much appreciated.

Can you physically see the router ? Then check what lights it is displaying when the connection drops

According to Vodafone's price list a static IP is free. Perhaps ask them for one?

Sadly not Zarjaz.the installation is in a rental house so I'm trying to diagnose it remotely. I can harvest the logs, but wouldn't know how to interpret them. I'm fairly sure that it reconnects without intervention.

Edited by RobAHorn (Tue 10-Oct-23 20:53:19)

Good spot behuk....I'll look into that

Or check to see if the router has dynamic dns support from the likes of no-ip, dyn.com, etc. BQM supports hostnames.

Many ISPs dynamic IPs are not sticky and will change on any reconnect.

ISPs can reboot their BRASes overnight for upgrades etc. That will cause all sessions to drop and re-establish, and you'll get a different IP address.

A couple of times a month sounds pretty reasonable.

The usual way to deal with this is dynamic DNS - your router updates a DNS entry with a DDNS provider when the session restarts.

Thank for response Oliver341. I'll try the DDNS route

Thanks for your response candlerb.
I will try the DDNS route.
If addresses changing is the norm, then that's fair enough. The reason I though they would be sticky is because there are at least two or three other installations that I look after....two VM and one TalkTalk, plus my home BB service (which is VM) all of which have had the same public IP address for yonks. Given that these are all in the same town, would the VM ones all terminate at the same VM BRAS?
Sorry to waffle on....I'm just trying to understand why it is inconsistent.

In reply to a post by RobAHorn:

there are at least two or three other installations that I look after....two VM and one TalkTalk, plus my home BB service (which is VM) all of which have had the same public IP address for yonks. Given that these are all in the same town, would the VM ones all terminate at the same VM BRAS?

Sorry, are we talking about Vodafone, or Virgin Media?

Are these all FTTC circuits, or FTTP, or some mixture?

You'd want to check whether the VDSL link stays up (the PPPoE session is terminated), or if the VDSL link itself goes down, which might be possible to see in router logs.

FTTC lines are likely to be interrupted for random reasons, including someone turning on their TV. They will be on different cabinets or different line cards in the same cabinet, and will be on different copper pairs, so basically nothing can be inferred about the reliability of one circuit from the others. In any case, an FTTC line which only reconnects twice a month is pretty good.

Such problems are very unlikely with FTTP. Light is light, and immune to EMI.

Sorry to confuse matters! The service in question at the start of the thread is VF, FTTP. The others I threw in as comparisons, one is FTTC and the rest are FTTP. The VF one is the one experiencing some sort of interrupt but I have a VM one that seems to be having similar issues. The comparisons were simply to demonstrate that I have two VM installations that seem to retain the same address and one that does not, which doesn't seem to make sense in the light of your explanation that BRASes rebooting would normally result in a different address being served to my router.
Needless to say I am struggling to get VM support to take an interest, but I admit I haven't engaged VF support yet
Anyway, I appreciate your responses....all good learning !