05-29-2008 12:20 PM - edited 03-03-2019 10:09 PM
I have a NM-CEM-4TE1 installed and would like to know if I can run 4 point-to-point circuits to a single location and utilize all 6MB of bandwidth as a single pipe.
05-29-2008 01:02 PM
Sure, you will want to configure PPP Multilink. Here's a link for reference.
http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a0080093d69.shtml
Hope that helps.
05-29-2008 01:16 PM
This will not work with the CEM T1 card. The current scenario is running circuit emulation over IP on one T1. I wnat to add three more for a total of four and utilize 6MB of bandwidth for CEoIP
05-29-2008 01:22 PM
Can you just add additional timeslots?
05-29-2008 01:49 PM
This sample from cisco shows how to do CEM with a channel group.
http://www.cisco.com/en/US/docs/ios/12_4/interface/configuration/guide/hbbfeamo.html#wp1118681
What happens if you have multiple T1's in the same CEM group? What happens to the local and remote IP addresses as well as the local and remote udp ports? Same IP addresses ? How is it recognized as being a 6mb pipe?
05-29-2008 02:03 PM
Yes, you would configure MLPPP for this. Or check if metro service is available.
05-29-2008 04:03 PM
I do not believe that MLPPP is the answer.
05-29-2008 05:00 PM
May be I didn't I didn't understood your question, can you explain in different words what you need to do, what is connected to what.
06-09-2008 06:59 AM
I have 4 T1 circuits that are Point-To-Point circuits. I have two routers with the config below. I have not been able to bring up the connection using CEMoIP. Is there something I am missing.
"ROUTER A"
controller T1 1/0
framing esf
cem-group 0 timeslots 1-24
clock source internal
cablelength long 0db
!
controller T1 1/1
framing esf
cem-group 0 timeslots 1-24
clock source internal
cablelength long 0db
!
controller T1 1/2
framing esf
cem-group 0 timeslots 1-24
clock source internal
cablelength long 0db
!
controller T1 1/3
framing esf
cem-group 0 timeslots 1-24
clock source internal
cablelength long 0db
!
cem 1/0/0
xconnect 192.168.20.1 0 encapsulation udp
local ip addr 192.168.10.1
local udp port 15901
remote udp port 15902
!
cem 1/1/0
xconnect 192.168.20.1 0 encapsulation udp
local ip addr 192.168.10.1
local udp port 15903
remote udp port 15904
!
cem 1/2/0
xconnect 192.168.20.1 0 encapsulation udp
local ip addr 192.168.10.1
local udp port 15905
remote udp port 15906
!
cem 1/3/0
xconnect 192.168.20.1 0 encapsulation udp
local ip addr 192.168.10.1
local udp port 15907
remote udp port 15908
!
interface Loopback1
ip address 192.168.10.1 255.255.255.255
!
******************************************************************************
"ROUTER B"
controller T1 1/0
framing esf
cem-group 0 timeslots 1-24
clock source adaptive 0 closed-loop
cablelength long 0db
!
controller T1 1/1
framing esf
cem-group 0 timeslots 1-24
clock source adaptive 0 closed-loop
cablelength long 0db
!
controller T1 1/2
framing esf
cem-group 0 timeslots 1-24
clock source adaptive 0 closed-loop
cablelength long 0db
!
controller T1 1/3
framing esf
cem-group 0 timeslots 1-24
clock source adaptive 0 closed-loop
cablelength long 0db
!
cem 1/0/0
xconnect 192.168.10.1 0 encapsulation udp
local ip addr 192.168.20.1
local udp port 15902
remote udp port 15901
!
cem 1/1/0
xconnect 192.168.10.1 0 encapsulation udp
local ip addr 192.168.20.1
local udp port 15904
remote udp port 15903
!
cem 1/2/0
xconnect 192.168.10.1 0 encapsulation udp
local ip addr 192.168.20.1
local udp port 15906
remote udp port 15905
!
cem 1/3/0
xconnect 192.168.20.1 0 encapsulation udp
local ip addr 192.168.10.1
local udp port 15908
remote udp port 15907
!
interface Loopback1
ip address 192.168.20.1 255.255.255.255
*********************************************
06-09-2008 07:14 AM
Hi, if you're trying to connect the two routers over the WAN T1 circuits, using the CEM interfaces, I don't think is not possible to do so.
To confirm that, confirm that is not possible to configure a channel-group under controller T1.
The CEM interfaces can be used only to connect devices for which you want to provide CEM services, and not as WAN interface for general network connectivity.
06-09-2008 07:21 AM
I have cem groups configured under the T1 controllers. See the config....
controller T1 1/0
framing esf
cem-group 0 timeslots 1-24
clock source internal
cablelength long 0db
This is also a "Cisco Sample Config" that has the same type of connectivity. see this link..
http://www.cisco.com/en/US/docs/ios/12_4/interface/configuration/guide/hbbfeamo.html#wp1118681
06-09-2008 07:28 AM
Hi, as mentioned before, the point is that the T1 controllers for the CEM card are meant to to be connected to device for which you are providing CEM.
It cannot be used for general WAN connectivity as you can note that by lack of any IP-configurable interface.
06-09-2008 09:58 AM
I may be wrong but if feel you should be looking for pseudowire solution.
below is the link with more information.
http://www.pseudowire.com/Home/0,6583,16491-Pseudowire_Technology,00.html
Hope this helps...
Regards,
Pravin
06-09-2008 10:01 AM
The mentioned product appears to be equivalent to the NM that provided circuit emulation services within the familiar IOS infrastructure.
The point here is that from my understanding, a "wrong use" was attempted for the CEM interfaces.
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