05-03-2010 10:48 PM - edited 03-15-2019 10:36 PM
Hi Guys,
I just wondering, which IP address on RouterD should I include on "session target ipv4" if for example:
RouterA would like to call RouterF, how do you direct the call to using the "PRI link" on RouterB >> RouterE >> RouterF? instead of going to RouterB >> RouterC >> RouterF as RouterC is set only for "backup link" incase if the "PRI link" is down.
eigrp/ospf routing protocol apply in this configuration....
RouterA--------------------RouterB------------------RouterC-|
10.0.0.1 10.0.0.2 | 10.0.0.3 10.0.0.4 | 10.0.0.9
| |
| (pri link - cloud) |(back up link)
| |
RouterD-------------------RouterE-------------------RouterF-| 10.0.0.10
10.0.0.5 10.0.0.6 10.0.0.7 10.0.0.8
Thanks in advance,
Terrence
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05-04-2010 07:55 AM
You don't need to create a loopback it is just a recommendation. What you need to do is bind your call control and media to a specific interface. A loopback is recommended because it is a logical interface and, as such, is not subjected to link failures that could occur on a physical interface. In your diagram (which may change for the next question) RouterD may have just one link. So, one may say "hey, since it has one link I will just use that link.". That could be true, but when you put together a design for a real life situation, you want to make sure you apply a design aspect such as IP address allocation, the use of loopback, call signaling protocol, etc. etc. across all components. At least as much as possible.
So, is it required: no. Is it recommended? By me - yes.
HTH.
Regards,
Bill
Please remember to rate helpful responses and identify
05-04-2010 03:57 AM
Set up a loopback interface on router F and use the IP address assigned to
it as the target. Enable a dynamic routing protocol and Bob's your uncle.
05-04-2010 04:27 AM
My answer to this is the same as it was when first posed by you in this thread:
https://supportforums.cisco.com/message/3065696#3065696
Regards,
Bill
Please remember to rate helpful responses and identify
05-04-2010 05:59 AM
Thanks James and thanks again William for your reply
but what happens if RouterA would like to call RouterD, so RouterA >> RouterB >> RouterE >> RouterD. Do I need to create a loopback int as well for RouterD?
Cheers,
Terrence
05-04-2010 07:55 AM
You don't need to create a loopback it is just a recommendation. What you need to do is bind your call control and media to a specific interface. A loopback is recommended because it is a logical interface and, as such, is not subjected to link failures that could occur on a physical interface. In your diagram (which may change for the next question) RouterD may have just one link. So, one may say "hey, since it has one link I will just use that link.". That could be true, but when you put together a design for a real life situation, you want to make sure you apply a design aspect such as IP address allocation, the use of loopback, call signaling protocol, etc. etc. across all components. At least as much as possible.
So, is it required: no. Is it recommended? By me - yes.
HTH.
Regards,
Bill
Please remember to rate helpful responses and identify
05-04-2010 04:32 PM
thanks for your help....
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