12-01-2014 11:57 AM - edited 03-07-2019 09:43 PM
I am testing a simple multicast setup using a single Cisco 1841 router with VLC. However I cannot get it to work. If VLCs are on the same subnet, it works. I tried both UDP and RTP multicast to 239.255.0.1. I tried both dense and sparse mode. There must be something fundamental that I am missing. I already increased the TTL in VLC but no luck.
Please help!
VLC Source -> Cisco Router -> VLC Viewer
192.168.10.200 -> 192.168.10.254 - 192.168.11.254 -> 192.168. 11.200
Current configuration : 907 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$.7dt$Safvc3dzyJCwubSKrJUs61
enable password 7 14141B180F0B
!
no aaa new-model
!
resource policy
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
ip cef
!
!
!
!
ip multicast-routing
!
!
!
!
!
!
!
!
interface FastEthernet0/0
description $ETH-LAN$
ip address 192.168.10.254 255.255.255.0
ip pim sparse-dense-mode
no ip mroute-cache
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.11.254 255.255.255.0
ip pim sparse-dense-mode
no ip mroute-cache
duplex auto
speed auto
!
!
!
ip http server
no ip http secure-server
!
snmp-server community public RO
!
!
!
!
control-plane
!
!
!
line con 0
line aux 0
line vty 0 4
password 7 13061E010803
login
!
end
Solved! Go to Solution.
12-01-2014 12:37 PM
Your configuration looks fine to me.
It does sound like a TTL issue to me but you say you have checked that.
How are the clients connected to the router and what does the multicast routing table show ie. "sh ip mroute" ?
Jon
12-01-2014 12:37 PM
Your configuration looks fine to me.
It does sound like a TTL issue to me but you say you have checked that.
How are the clients connected to the router and what does the multicast routing table show ie. "sh ip mroute" ?
Jon
12-02-2014 11:54 AM
It turns out that the VLC GUI TTL has a bug. Even if I specify TTL of greater than 10, it still shows TTL of 1 when using wireshark. I end up using VLC command line which works.
12-01-2014 03:04 PM
Under both interfaces, can you delete "no ip mroute-cache"
and try again?
HTH
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