01-18-2021 07:41 AM
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Ask questions from Tuesday, January 19 to Friday, January 29, 2021
In this session attendees will receive an introduction to Software Defined-WAN (SD-WAN) and the importance of control connections, and learn how to configure devices using Templates (Device/Feature) and the importance of the Overlay Management Protocol (OMP). There will be a live demonstration during the event to provide a practical overview about the OMP and it's capabilities.
For more information, visit the Networking page.
01-19-2021 12:05 PM
Hi Juan Rangel and Juan Flores!
Could you help me to answer the questions below, please?
Q: What could be the best practice if we want to avoid a redistribution of the local default static route to the SD-WAN fabric?
01-20-2021 07:28 PM
Hello,
You can always configure and use a Route Policy, it can be found under the Localized Policy section in order to allow/block any route, if I could compare with traditional Cisco configuration it would be a Route-Map that you can apply in the redistribution level of any given protocol. This Route Policy can be used in all the different protocols supported by SD-WAN, not limited to only OMP, for instance EIGRP, OSPF and BGP.
Thanks for sharing your question, should you have further questions don't hesitate to post it here.
01-19-2021 12:06 PM
Q:On the best path algorithm no, 7 tiebreakers. What is meant by the higher private IP address? Please clarify.
01-20-2021 01:13 PM
Hello!
For this tiebreaker, it means the higher numeric value, for example 1.1.1.10 is higher than 1.1.1.5.
I hope this clarifies your question!
Thanks.
01-19-2021 12:07 PM
Q:What would happen if there is no private IP address on the vEdge?
01-20-2021 07:34 PM
Hello,
You can configure your vEdge router or cEdge router (Viptela Router and Cisco IOS-XE Edge router respectively) with and with out Private IP address and with/without Public IP address in the Transport Side / Transport VPN. We can define Transport VPN as the VPN that will be facing the SD-WAN Overlay and the interface will be attached to the PE or Site's CPE.
We can even use DHCP for dynamic assignment of the IP in this interface. For Public IP in the interface, it can work with no issues as long as it is reachable from any remote router and controllers, this can be accomplished asking the ISP to allow communication. When you have Private IP address you can use NAT either on the vEdge router or another router that could be one or more hops ahead of the mentioned vEdge router (it can even be a Firewall).
In conclusion, Private or Public ip addresses can be used under Transport Interface for any given SD-WAN Edge router.
Feel free to share any other questions you may have.
Thanks.
01-19-2021 12:07 PM
Q:What happens when the vEdge managed by vSmart loses its control connections, can I still make changes via the CLI? If so, how?
01-20-2021 06:31 PM - edited 01-20-2021 06:33 PM
Hi,
Thanks for sharing your question
If for some reason we vEdge loses control connections with the vSmart we need to confirm if the device still in vManaged mode or not with the command "show system status" ; at the end you will see the following output
Personality: vsmart
Model name: vsmart
Services: None
vManaged: true
vManaged can be "true" or "false"
If the status is "true" then from vManage we need to move to CLI mode
on this section:
Configuration->Devices->Change Mode--Controllers
Then vEdge will be moved to CLI mode and we can make configuration changes.
To make configuration changes on CLI, the line vManaged, needs to me on "false"
Best Regards
01-20-2021 08:08 PM
Hello,
It is important to mention that if you lose Control Connections and your Edge router is in vManage mode, you could fall into the question in fact: How can I make changes?
It is true what my colleague Juan Rangel mentioned above, but I would like to add that. When CC is lost, the Edge router will give you the "opportunity" to make changes and commit the changes until you restore the Control Connections. Say, you accidentally change the next hop's IP Address, so it is now in a different subnet so your Transport Interface needs to be update, hence control connection is lost. During that time thee Edge router, even though it is in vManage mode, it will allow you to commit the change of thee IP Address and in that way restore control connection; of your you should have already updated your Device Template with the new address (for this example).
On the other hand, there's a way to Manually force the CLI mode even if your vEdge or cEdge is in vManage mode. However to do so, you would need to contact Cisco TAC and raise a case with us because we need to enter a hidden command with our special password, but we would be happy to help you!.
If your vEdge loses vSmart's connection, the OMP Peer will bee lost but, at this moment Graceful restart will take care of your control plane and save a copy of your Routing OMP table to avoid any network outage in this router.
Best Regards.
01-19-2021 02:11 PM
When will the live OMP demonstration take place?
01-20-2021 05:51 PM
Hi Gioacchino,
During the Webcast, at the end we shared the SD-WAN OMP Lab.
Best Regards
01-23-2021 02:54 AM
Thanks Juan,
where may I find the webcast's link?
Regards,
Gio
01-26-2021 05:08 AM
01-20-2021 12:45 AM
What is minimum requirement to setup SD-WAN in terms of connectivity/licenses? Will vedge and vsmart be enough to connect 2-3 remote offices together?
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