NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Mosaic on decoded IP Stream
Hello guys,
I have a network remote comprising of switch netgear gs724T. On One site two different stream are present on the switch with different Vlan and Multicast address
Site A
1. Vlan 111 - First IP Stream with a Multicast Address are pooled on port 3 4 & 5 to be connected on decoder and the stream are fine
2. Vlan 112 - Second IP stream with a multicast address is originated from an ip decoder and connected to port 11 and 12 where to be decoded on site b
On Site B
1. the Vlan 112 is beind decoded and monitored where the video is MOSAIC.
Note
From site a to site b microwave link is used with a capacity 1 gbps and all config is ok
IGMP was configured globally and for each VLAN. the issue of mosaic persists
kindly advise for a solution
Thanks
13 Replies
Start with the exact GS724T model and firmware version in place. There exist roughly more than a dozen different GS724T models and versions - Netgear created many different ones over more than two decades....
Since all GS724T models are Smart Managed switches, your post was moved by a moderator to the appropriate community section.
Wild guess: All the GS724T models are maintaining and showing a multicast table in he Web UI. Start there.
The switch is GS724T v4. The firmware is 6.3.1.43.
the table is displayed and each port has its vlan required.
why this degradation in video occur? is there any configuration should be done?
Thanks
why this degradation in video occur? is there any configuration should be done?Nothing obvious does pop-up in my grey cells these minutes.
Worth having an eye on the
https://kb.netgear.com/000065818/GS716Tv3-GS724Tv4-GS748Tv5-Firmware-Version-6-3-1-47 Release Notes - ref. MLD snooping (IPv6 specific) and some potential signal issues on some higher port numbers.
Site A
1. Vlan 111 - First IP Stream with a Multicast Address are pooled on port 3 4 & 5 to be connected on decoder and the stream are fine
2. Vlan 112 - Second IP stream with a multicast address is originated from an ip decoder and connected to port 11 and 12 where to be decoded on site b
On Site B
1. the Vlan 112 is beind decoded and monitored where the video is MOSAIC.
From site a to site b microwave link is used with a capacity 1 gbps and all config is okI am thinking that the switch is at Site A and that the VLAN 111 decoder is also on site A. Is that the case?
If so, I am guessing that there might be some packet loss on the microwave link. Do you have any way to see stats on the link?
If you temporarily put a decoder at site A (on Vlan 112), do you see the same artifacts?
Hello,
The switch is at site A and the decoder for Vlan 111 is at site A confirm.
I have check the microwave link and it was checked by an expert but there was no packets loss on microwave link, no errors observed
If i put a decoder at Site A for Vlan 112, yes i see same artifacts!
If i put a decoder at Site A for Vlan 112, yes i see same artifacts!
Ok, I think that rules out the microwave link.
If you switch the two sources, does the problem move with the source, or does it stay with the VLAN?
Have you set Jumbo frames (MTU) on all ports, including the microwave link? Try first on one switch in Site A with an encoder and decoder as StephenB suggested previously but with the MTU changes. Make sure you follow the network set up guide for your video equipment to make sure no additional changes are made but generally video over ip needs multicast and MTU set correctly.
Have you set Jumbo frames (MTU) on all ports, including the microwave link?
CHO29: If the traffic on the microwave link is tagged, then setting the MTU to the usual 1500 could result in some packet fragmentation, particularly on the i-frames in the video stream. You'd want at least 1522.
Obviously check the microwave link manual to find out the max MTU it can handle. Or use ping to figure out the ceiling.
The encoder might also have a setting to limit max packet size.
Today i have perform a test for the vlan 112 on site where i decoded it on another port configure with vlan 112 and there is no artifacts confirm
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
