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Strange ping behaviour

philguk
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26 Jul 2021 21:02 #1 by philguk

Strange ping behaviour was created by philguk

I have an AP800 that has two SSIDs defined. Let’s call them FRED & BERT. They are both associated with the SAME LAN (the only one I have) and are supported by the same DHCP server so get IP addresses from the same pool

When I connect to BERT I can ping all WIRED devices, but I cannot ping devices connected to FRED. If I switch to FRED, I can now ping other Fred devices (and wired ones) but now I can’t ping BERT devices

Is this expected behaviour? I certainly wasn’t expecting it to work this way

Is there something I can do to make wirelessly attached devices visible to each other REGARDLESS of which SSID I connect to??

Thanks

Phil G

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hornbyp
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26 Jul 2021 21:41 #2 by hornbyp

Replied by hornbyp on topic Re: Strange ping behaviour

Is "Isolate members with IP" enabled ? (Wireless LAN>>Advanced settings - assuming it is available on the AP800)

See: https://www.draytek.com/support/knowledge-base/5457

Draytek wrote: Members Isolation with IP is a new feature introduced in firmware version 1.2.3. When this setting is enabled, the AP inspects the source and destination IP addresses of each packet and blocks the wireless clients attempt to discover network clients by sending ICMP requests to the gateway to discover the network clients.

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philguk
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27 Jul 2021 09:15 #3 by philguk

Replied by philguk on topic Re: Strange ping behaviour

hornbyp wrote:
Is "Isolate members with IP" enabled ? (Wireless LAN>>Advanced settings - assuming it is available on the AP800)

See: https://www.draytek.com/support/knowledge-base/5457

Draytek wrote: Members Isolation with IP is a new feature introduced in firmware version 1.2.3. When this setting is enabled, the AP inspects the source and destination IP addresses of each packet and blocks the wireless clients attempt to discover network clients by sending ICMP requests to the gateway to discover the network clients.

I’ll double check, but pretty sure this is DISABLED by default?

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philguk
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27 Jul 2021 12:34 #4 by philguk

Replied by philguk on topic Re: Strange ping behaviour

Ok, I see ONE option



Code:
 Isolate Member: Wireless clients (stations) with the same SSID
  cannot access for each other.

This is NOT enabled, but it talks about isolating stations on the SAME SSID

Does this imply stations on DIFFERENT SSIDs are always isolated??

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hornbyp
User

27 Jul 2021 13:32 #5 by hornbyp

Replied by hornbyp on topic Re: Strange ping behaviour

philguk wrote:
Does this imply stations on DIFFERENT SSIDs are always isolated??

I don't have an AP800, but I just tried on an AP903. Two mobile phones on different or same SSID - but same IP network in each case, can always Ping one another. (However, the SSID s were configured to use VLAN tags, so that's another variation).

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philguk
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27 Jul 2021 15:13 #6 by philguk

Replied by philguk on topic Re: Strange ping behaviour

hornbyp wrote:

philguk wrote:
Does this imply stations on DIFFERENT SSIDs are always isolated??

I don't have an AP800, but I just tried on an AP903. Two mobile phones on different or same SSID - but same IP network in each case, can always Ping one another. (However, the SSID s were configured to use VLAN tags, so that's another variation).

Thanks for that.

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