Cisco Cisco 4G LTE Enhanced High-Speed WAN Interface Cards for LATAM Guida Informativa
Q&A
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What is the command to show whether I have obtained an IP address?
The command is show interface cellular x/x/x.
The command is show interface cellular x/x/x.
Can I configure a static IP address under my cellular interface or does the IP address
always have to be negotiated?
It is highly recommended that the IP address always be configured as ip address negotiated,
even when a fixed (persistent) IP address is required. The cellular interface is spoofed as
up/up (status/protocol states), regardless of whether or not the PPP is established. If this
interface is configured with a specific IP address (instead of ip address negotiated), and if the
PPP is not yet established, the routing table interprets a valid route available through the
cellular interface. This problem is avoided by assigning a negotiated IP address. The
configuration given previously is particularly important when using the cellular interface as a
backup interface.
It is highly recommended that the IP address always be configured as ip address negotiated,
even when a fixed (persistent) IP address is required. The cellular interface is spoofed as
up/up (status/protocol states), regardless of whether or not the PPP is established. If this
interface is configured with a specific IP address (instead of ip address negotiated), and if the
PPP is not yet established, the routing table interprets a valid route available through the
cellular interface. This problem is avoided by assigning a negotiated IP address. The
configuration given previously is particularly important when using the cellular interface as a
backup interface.
I am trying to bring up a 3G HWIC (HWIC-3G-GSM), but is always stuck at the IPCP
stage.
Verify the following:
Verify the following:
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Verify that you have an active signal.
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Check to see if your SIM card is activated.
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Verify the APN, authentication, and username and password provided by your service
provider.
provider.
The cellular interface on the 3G HWIC (HWIC-3G-GSM) continuously enters into the
shutdown status. Also the profile is not activating, even if the cellular interface comes
up for some time. What is wrong?
The profile does not become active until you are fully connected to the network. Verify that the
profile number in the CHAT script:
The profile does not become active until you are fully connected to the network. Verify that the
profile number in the CHAT script:
chat-script gsm "" "ATDT*98*1#" TIMEOUT 60, which is "1" in this case, corresponds to the
profile number configured for the cellular interface.
profile number configured for the cellular interface.
Also verify the dialer and cellular configurations as indicated in the configuration guides
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On a 3G HWIC (HWIC-3G-GSM), the interface on the router comes up but then resets
almost instantaneously when the ping stops. The debug ppp debug command output
indicates what I think is a successful authentication, but it appears that the IP address
is not being passed to the router even though the addresses of the DNS servers are
being pulled.
Verify that the username, password, and host name credentials under the show cellular x/x/x
command output and the cellular profile match.
Verify that the username, password, and host name credentials under the show cellular x/x/x
command output and the cellular profile match.
My customer with a 3G wireless HWIC (HWIC-3G-GSM) is reporting a problem pinging or
getting pinged.
Verify that the syntax for the CHAT script is correct and is as follows:
Verify that the syntax for the CHAT script is correct and is as follows:
chat-script gsm "" "ATDT*98*1#" TIMEOUT 60
where "1" in this case corresponds to the profile number configured for the cellular interface.