Inter-VLAN Multicast routing in multiple switch environment over trunk issue at end switch

[ghazizadeh]

Hi Everone,

i'm not very experienced in Multicast routing , i would appreciate your help in below issue that i'm facing,

here is my setup,

Cisco-6509E with few VLAN , Multicast Stream source are present on VLAN3 ,

Cisco 6509E ---> port channel Trunk (2 SFP 1Gb) ---> 3750G-12S  --> Trunk (single Port) ---> 3750G-24TS

All vlan associated with Trunk is available on all switchs

6509E running  151-2.SY11 advancedipservice

3750G-12S Running 12.2(40) SE , advanceipservice

3750G-24TS Running  12.2(55)SE12 ,  IPSERVICE

multicast route between VLAN in 6509E is working fine,

on 3750G-24TS if i put any port in vlan3, easily can see all the multicast stream that is present in 6509,

but when i cannot see the stream from another VLAN (VLAN 401), 

6509E VLANs

interface Port-channel2
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 2-4,100
 switchport mode trunk
 switchport nonegotiate
end

interface Vlan3
 ip address x.x.x.x 255.255.255.0
 ip pim sparse-dense-mode
end

3750G-12S

interface Port-channel1
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 2-4,100
 switchport mode trunk
 switchport nonegotiate
end

interface GigabitEthernet1/0/1
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 2-4,100
 switchport mode trunk
 switchport nonegotiate
end
interface Vlan3
 ip address x.x.x.x+1 255.255.255.0
 ip pim sparse-dense-mode
end

3750G-24ts

interface GigabitEthernet1/0/25
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 2-4,100
 switchport mode trunk
 switchport nonegotiate
end

interface GigabitEthernet1/0/3
 switchport access vlan 401
 switchport mode access
end
!
interface GigabitEthernet1/0/6
 switchport access vlan 3
 switchport mode access
end

!
interface Vlan3
 ip address x.x.x.x+2 255.255.255.0
 ip pim sparse-dense-mode
end

!
interface Vlan401
 ip address y.y.y.y 255.255.255.248
 ip pim sparse-dense-mode

end

[Reza Sharifi]

switchport trunk allowed vlan 2-4,100

There is no vlan 401 on the trunk port.

Also, what device is doing the routing for all vlans 6500 or 3750?

HTH

[ghazizadeh]

VLAN 401 don't exist on trunk

the reason is that one VLAN3 there are many multicast stream and we want only selected multicast to be on VLAN 401

3750 is doing the routing between vlan3 and vlan401 

---

[ghazizadeh · Accepted solution]

an update,
found the problem, for anyone that might encounter this,
issue was that ip routing was not enabled in 3750

[georgehewittuk1]

Glad you found problem. Sometimes with multicast good to check show ip mroute, the rendezvous point is configured/learnt and for pim adjacencies.