We are trying to setup a IGMP snooping testbed using Cisco 7606 router
and we need some advice about the same. Here is what we are trying to
set up:
+------------+
| |
P1/V1===| |P4/V4
| |===== Mcast source
P2/V2===| Cisco 7606 |
| |
P3/V3===| |
| |
+------------+
* IGMP reports will be received over P1, P2 and P3 with VLAN IDs V1, V2
and V3 respectively.
* Port P4 is connected to a multicast source and will act as the mrouter
interface for the IGMP snooping VLAN.
* V1, V2, V3 and V4 are all different 802.1Q VLAN tags.
Requirement is that all the ports belong to the same VLAN and IGMP
snooping is enabled on this VLAN interface.
All the frames going out of the ports P1, P2 and P3 will be tagged with
802.1q VLAN ID of V1, V2 and V3 (where V1, V2 and V3 are all different).
Our concern is that will this configuration work or does Cisco mandate
that V1, V2, V3 and V4 should be numerically same.
One question: Can an IGMP snooping VLAN have more than one mrouter
interfaces? If yes, can they be tagged with different VLAN IDs?
Our current configuration, which is using untagged frames on P1, P2 and
P3, looks like follows:
interface GigabitEthernet1/14
no ip address
speed nonegotiate
switchport
switchport access vlan 63
switchport trunk encapsulation dot1q
switchport mode trunk
! This is for the mrouter port
interface GigabitEthernet3/1
no ip address
switchport
switchport access vlan 63
switchport mode access
! Port P1
interface GigabitEthernet3/34
no ip address
switchport
switchport access vlan 63
switchport mode access
! P2
interface Vlan63
ip address 20.1.63.27 255.255.255.0
ip igmp snooping querier
shutdown
!
Thanks in advance.
--- Sarah Zhao
