a question regarding private vlans

Hey everyone I'm studying for CCNP SWITCH 300-115 and in private vlans section their is something that make me confused
"Secondary vlans can communicate with each other but cannot communicate with other secondary vlans"
so my question is if i have a situation like this :

assume all configuration are good

so those PC couldn't communicate with each other am I correct?(I couldn't test it because I don't have the necessary equipment)

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d4nz1g

In this case, the traffic will be routed. So, yes; they will talk to each other.

niba10

d4nz1g wrote: »

In this case, the traffic will be routed. So, yes; they will talk to each other.

so that sentence is effected only on LAN?

brombulec

In private vlans you have 2 types of secondary VLANs:
1. Isolated - the members can talk only to promiscuous ports and CAN'T talk to each other
2. Community - the members can talk to promiscuous ports and CAN talk to all the members of this particular VLAN.

In both cases users CAN'T talk to users in other vlans unless the traffic is routed.

d4nz1g

d4nz1g wrote: »

In this case, the traffic will be routed. So, yes; they will talk to each other.

In the switching point of view, the traffic went from the source (isolated port, for example) towards the default gateway (promiscuous port), and that is fine. At the destination, the traffic went from the router on a promiscuous port and then forwarded to the host, on an isolated port.

dppagc

Correct me if I am wrong.
If the 2 switches are connected through a trunk and not a router, they cannot talk to each other.

jahsoul

@dppagc

Without L3, host in the same VLAN can still communicate with each other, even on different switches. L3 is only needed for inter-VLAN communication.

dppagc

jahsoul wrote: »

@dppagc

Without L3, host in the same VLAN can still communicate with each other, even on different switches. L3 is only needed for inter-VLAN communication.

Oh the picture is removed. I was talking about 2 secondary vlans.

Danielh22185

dppagc wrote: »

Correct me if I am wrong.
If the 2 switches are connected through a trunk and not a router, they cannot talk to each other.

Correct. However that concepts carries with normal L2 switching in general. If you have 2 separate vlans one cannot talk to the other without routing.