NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Multicast routing between subnets/VLANs
Hi,
Where I work we have purchased a GS108TV3 switch.
We are currently trying to set it up so that we can route multicsat traffic between 2 subnets and we are struggling to get this working.
The setup is as follows:
Multiple ARM-based devices attached to a simple switch on 10.190.44.X/255.255.254.0. This switch connected to port 8 (g8) on the GS108TV3 switch.
Multiple WIndows-based PCs attached to a simple switch on 10.190.46.X/255.255.254.0. This switch is connected to port 7 (g7) on the GS108TV3 switch.
We have setup VLAN2 against the network connected to port 7 and VLAN 3 against the network attached to port 8. We have enabled IGMP snooping for these ports/VLANs and multicast routing. We have gone through the settings multiple times on the switching and routing sections of the web UI.
However, when we run Wireshark on one of our PCs on the 10.190.46 subnet we can only see the multicasts that are on this subnet and do not see any of the ones from the 10.190.44 network routed acros the VLANs. On this PC we have also installed another network card and connected it to the 10.190.44 network switch and if we use wireshark on that network adapter we can see the multicasts from the 10.190.44 subnet directly. Just not through the 10.190.46 adapter as a result of routing on the GS108TV3.
We have tried setting different TTL values on the ARM devices that are publishing multicasts on 10.190.44 subnet but nothing makes a difference. The multicast group address in question is 239.255.0.1, not that I thnk this has any bearing on the issue itself.
The ARP table shown on the GS108TV3 web UI lists all the devices on both subnets that we would expect to see. We simply don't see how to get the routing working or what we may have done wrong.
Clearly we have either missed something in the setup on the GS108TV3 or we cannot acheive what we want with this switch.
Any tips/help/suggestions are welcome.
Many thanks,
Duncan
2 Replies
Replies have been turned off for this discussion
There is no Multicast routing on these comparebly simple switches.
As this is a limited environment, you can go the hard way.
Switching -> Multicast -> IGMP Snooping -> IGMP Snooping Configuration ..disable everything.
- IGMP Snooping
- Validate IGMP IP Header
- Block Unknown Multicast Addresses
- Auto-Video Configuration
Switching -> Multicast -> IGMP Snooping -> IGMP Snooping Interface Configuration
- Select at least hte ports where you need the Multicast (port and/or LAGs)
- Disable Admin Mode (for the IGMP Snopping that is)
Ok thanks we'll give it a go and see if we get anywhere.
Regards
Duncan
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
