Cisco Cisco MGX-FRSM-HS2 B Serial Frame Service Module Technisches Handbuch

#module 2 : 5−port Communication Media Mod.             

set vlan 2 2/3−5

interface Vlan2

 ip address 172.168.1.1 255.255.255.0

The Fast Ethernet interface of the ACT module is used only to send and receive RTP packets of the ACT
module (for transcoding and conference calls). All other non−RTP packets (such as ICMP ping request and
reply) from the ACT module are sent to the supervisor via the Gigabit Ethernet interface. If the RTP packets
that originated from the ACT module are sent via the Gigabit Ethernet interface instead of Fast Ethernet
interface, the transcoding and conferencing call might experience one−way audio.

When the IP address of the CMMs Fast Ethernet interface is pinged from the Cat 6500 switch or from
anywhere outside the CMM, the ICMP echo request reaches the CMM via the Fast Ethernet interface.
However, the ICMP echo reply from the ACT module is sent via the Gigabit interface since ICMP is a
non−RTP packet.

The RTP packets of the voice calls terminated or originated from the T1 or E1 port adapter and FXS module
are sent via the Gigabit Ethernet interface.

You can use these show and debug commands in order to troubleshoot IP connectivity issues:

In the MSFC, use these commands:

♦ 

♦ 

♦ 

• 

In the CMM, use these commands:

♦ 

♦ 

♦ 

• 

In addition, SUP 720 provides an internal sniffer tool that can be used to capture frames and packets. Contact
TAC for assistance with this tool.

MSFC#show arp