224.0.1.40
    00:30:03: IGMP: Received Group record for group 224.0.1.40, mode 2 from

192.168.4.1 for 0
    sources
    00:30:03: IGMP: Updating EXCLUDE group timer for 224.0.1.40
    00:30:16: PIM: Send v2 Hello on FastEthernet0
    00:30:21: PIM: Send v2 Hello on Serial0
    00:30:21: PIM: Received v2 Hello on Serial0 from 192.168.0.2
    00:30:21: PIM: Hello packet has unknown option 20, ignored
    00:30:23: PIM: Received v2 Hello on Serial1 from 192.168.1.2
    00:30:24: PIM: Send v2 Hello on Serial1
    00:30:46: PIM: Send v2 Hello on FastEthernet0
    00:30:51: PIM: Send v2 Hello on Serial0
    00:30:51: PIM: Received v2 Hello on Serial0 from 192.168.0.2
    00:30:51: PIM: Hello packet has unknown option 20, ignored
    00:30:53: PIM: Received v2 Hello on Serial1 from 192.168.1.2
    00:30:54: PIM: Send v2 Hello on Serial1
    00:31:00: IGMP: Send v2 general Query on FastEthernet0
    00:31:00: IGMP: Set report delay time to 2.2 seconds for 224.0.1.40 on FastEthernet0
    00:31:03: IGMP: Send v2 Report for 224.0.1.40 on FastEthernet0
    00:31:03: IGMP: Received v2 Report on FastEthernet0 from 192.168.4.1 for [待续]