Catalyst 3550 PIM & Multicast across two Vlan

[Rusnel.Rossi]

Gentlemen  
Good morning and many thanks for your help.

In my lab: 

One Cisco Catalyst ws-c3550-48-emi
Version C3550 Software (C3550-IPSERVICES-M), Version 12.2(44)SE6, RELEASE SOFTWARE (fc1)

One PC-Host
One Ip Camera unicast and multicast stream capable

My purpose:

The Pc-Host is the Vlan 2;  the IP-Camera in the Vlan 3;  and using VLC I want to see the IP-Camera video using a multicast stream.     

On the switch:

write erase....starting with a new config

Creating two Vlan:

Interface Vlan2 Host-PC
Ip add 10.0.0.254/24

Interface Vlan3 IP-Camera
Ip add 172.17.14.254/24

Interface fa 0/2
Access vlan 2

Interface fa 0/3
Access vlan 3

Assign to Host Pc IP: 
10.0.0.10/24 
DG 10.0.0.254

Assign to IP-Camera IP: 
172.17.14.205 
DG 172.17.14.254
224.16.32.2

Plug the Pc and the TLC in the correct interface fa0/2-3...

Ping OK L3 connection OK

From the PC client using VLC and the correct string I can open the unicast stream of the TLC.
From the PC client using VLC and the correct string I CAN'T open the MULTICAST stream of the TLC.
Try to put Ip-Camera and TLC into the same Vlan (changing IP) OK I can see the multicast stream using the string for the multicast stream.

Putting PC-Host and the TLC in different Vlan I'm not able to see the multicast streem.

I Have try different config

Enabling only 
ip multicast routing 

ip pim sparse-mode

on the vlan2 & vlan3  interface 

But nothing multicast only unicast...

Enabling ip sap listen on the vlan interface but nothing...

Creating loopback0 interface with pim and ip pim rp-address on it....nothing

Enabling ip pim rp-address on the vlan Interface...nothing...

I can always see the multicast only if the source and the destination are into the same Vlan (changing the host IP or TLC IP)

At any config change the switch was restarted !

Config 1 

L2 Multicast Ok

L3 Multicast NO

Switch#show running-config
Building configuration...

Current configuration : 4374 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Switch
!
!
no aaa new-model
ip subnet-zero
ip routing
no ip domain-lookup
!
ip multicast-routing
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface FastEthernet0/2
 description *** PC-Client-10.0.0.10 ***
 switchport access vlan 2
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/3
 description *** TLC-172.17.14.205 ***
 switchport access vlan 3
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/4
 switchport mode dynamic desirable
!
interface FastEthernet0/5
 description *** Test4L2Multicast***
 switchport access vlan 3
 switchport mode access
 spanning-tree portfast
!

!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan2
 description *** Gateway-PC ***
 ip address 10.0.0.254 255.255.255.0
 ip pim sparse-mode
 !
interface Vlan3
 description *** Gateway-TLC ***
 ip address 172.17.14.254 255.255.255.0
 ip pim sparse-mode

!

***********************************************************************

Config 2

L2 Multicast Ok 

L3 Multicast NO

Switch#show running-config
Building configuration...

Current configuration : 4374 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Switch
!
!
no aaa new-model
ip subnet-zero
ip routing
no ip domain-lookup
!
ip multicast-routing
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface Loopback0
 ip address 10.10.10.10 255.255.255.255
 ip pim sparse-mode

!
interface FastEthernet0/2
 description *** PC-Client-10.0.0.10 ***
 switchport access vlan 2
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/3
 description *** TLC-172.17.14.205 ***
 switchport access vlan 3
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/4
 switchport mode dynamic desirable
!
interface FastEthernet0/5
 description *** Test4L2Multicast***
 switchport access vlan 3
 switchport mode access
 spanning-tree portfast
!

!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan2
 description *** Gateway-PC ***
 ip address 10.0.0.254 255.255.255.0
 ip pim sparse-mode
 !
interface Vlan3
 description *** Gateway-TLC ***
 ip address 172.17.14.254 255.255.255.0
 ip pim sparse-mode
!
ip classless
ip http server
!
ip pim rp-address 10.10.10.10
!

********************************************************************************

Config 3

L2 Multicast Ok 

L3 Multicast NO

Switch#show running-config
Building configuration...

Current configuration : 4374 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Switch
!
!
no aaa new-model
ip subnet-zero
ip routing
no ip domain-lookup
!
ip multicast-routing
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface Loopback0
 ip address 10.10.10.10 255.255.255.255
 ip pim sparse-mode
 ip sap listen
!
interface FastEthernet0/2
 description *** PC-Client-10.0.0.10 ***
 switchport access vlan 2
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/3
 description *** TLC-172.17.14.205 ***
 switchport access vlan 3
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/4
 switchport mode dynamic desirable
!
interface FastEthernet0/5
 description *** Test4L2Multicast***
 switchport access vlan 3
 switchport mode access
 spanning-tree portfast
!

!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan2
 description *** Gateway-PC ***
 ip address 10.0.0.254 255.255.255.0
 ip pim sparse-mode
 ip sap listen
!
interface Vlan3
 description *** Gateway-TLC ***
 ip address 172.17.14.254 255.255.255.0
 ip pim sparse-mode
 ip sap listen
!
ip classless
ip http server
!
ip pim rp-address 10.10.10.10

*******************************************************************************

Config 4

L2 Multicast Ok

L3 Multicast NO

Switch#show running-config
Building configuration...

Current configuration : 4374 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Switch
!
!
no aaa new-model
ip subnet-zero
ip routing
no ip domain-lookup
!
ip multicast-routing
ip multicast multipath
ip igmp snooping querier
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface Loopback0
 ip address 10.10.10.10 255.255.255.255
 ip pim sparse-mode
 ip sap listen
!
interface FastEthernet0/2
 description *** PC-Client-10.0.0.10 ***
 switchport access vlan 2
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/3
 description *** TLC-172.17.14.205 ***
 switchport access vlan 3
 switchport mode access
 spanning-tree portfast
!
interface FastEthernet0/4
 switchport mode dynamic desirable
!
interface FastEthernet0/5
 description *** Test4L2Multicast***
 switchport access vlan 3
 switchport mode access
 spanning-tree portfast
!

!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan2
 description *** Gateway-PC ***
 ip address 10.0.0.254 255.255.255.0
 ip pim sparse-mode
 ip sap listen
!
interface Vlan3
 description *** Gateway-TLC ***
 ip address 172.17.14.254 255.255.255.0
 ip pim sparse-mode
 ip sap listen
!
ip classless
ip http server
!
ip pim rp-address 10.0.0.254
!

[Jon Marshall · Accepted solution]

Check the TTL in your packet captures.

I have never come across it but I believe there is a bug in some versions of the VLC GUI where even if you set a higher TTL it still sends it as TTL = 1.

If that's the case you can use VLC from the command line and set the TTL there.

Your TTL needs to be > 1.

Jon

[Rusnel.Rossi]

Thank you very much Jon Marshall. 

The problem was the TTL!

Not in the VLC setting but in the IP-Camera !

After checking the TTL of the Ip Camera I have notice that it doesn't change.

Changing the TTL value from web menù of the IP-Camera  it doesn't change in the packet capture still remain at "1";  it is a firmware bug.

Updating the IP-Camera firmware I can change the TTL with a higher than 1 value and it solved the problem.

If someone use VLC to stream a video into multicast will have the same problem.

Must change the TTL setting adding ",TTL=xx" before the last } via command line.