Troubleshooting guide

6-8
Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
OL-5169-01
Chapter 6 Troubleshooting MTAs
Motorola Surfboard
Motorola Surfboard
Although the Motorola Surfboard is not a Cisco product, a certain amount of data concerning how to
troubleshoot this cable modem has been acquired during solution testing; however, your primary source
for troubleshooting information should be the documentation provided by the manufacturer, Motorola.
The Motorola SBV4502 uses a DOCSIS 1.1 and PacketCable™ compliant cable modem to transfer high
speed data and digital voice. The Motorola SBV4502 provides high-speed, bi-directional data access in
a two-way broadband cable system with Radio Frequency (RF) downstream transfer rates up to 38 Mbps
and RF upstream rates up to 10 Mbps.
Major Features
The major features of the SBV4502 are as follows:
• Voice and data over a single coaxial cable network
• Standard telephone features and CLASS features such as caller ID, call waiting, and call forwarding.
Detects tones, such as dual tone multi-frequency (DTMF). Generates tones such as busy and dial
tones. Eliminates echoes generated in the loop between the subscriber line interface and the
telephone.
• Remote management through SNMP
• Automatic configuration and address assignment
• Software upgrades over the network
• Transport Control Protocol/Internet Protocol (TCP/IP)
• Complies with industry standards (DOCSIS, Packet Cable, etc.).
MTA reports success at step 25,
but proceeds to contact KDC
again for ‘cms’ service
a. MTA config file points to
incorrect CMS
b. MTA config file has
pktcMtaDevCmsIPsecCtrl
value missing or set to ‘1’,
meaning do secure NCS call
signaling, or uses an ascii
suffix that does not match
that of CMS FQDN
a. Correct config file, or reconfigure BTS to use
FQDN listed in the config file
b. Correct config file. If intention is to do secure
signaling, take necessary steps to configure KDC
and BTS for support (out of scope of this doc).
MTA reports success at step 25,
RSIPs, but gets no response or
gets an errored response from
the softswitch
a. MTA is unprovisioned or
incorrectly provisioned on
the Cisco BTS 10200
b. No DNS entry exists for the
EMTA
a. Provision MTA on the Cisco BTS 10200
b. Place an entry in correct DNS zone for EMTA
(DDNS preferred method – see CNR
documentation on how to enable DDNS)
Table 6-1 Trobleshooting Scenarios (continued)
Problem Possible Causes Remedies