I am using a router to act like a relay agent between a dhcp server and a cpe. This is done to provide voip service (SIP) to customers. There are multiple unnumbered interfaces(one per site) which use as a gateway interface, a specific loopback. The current config looks like that:
encapsulation dot1Q xxxx second-dot1q xxxx
ip vrf forwarding xxxxxxx
ip dhcp relay information trusted
ip unnumbered Loopback350012011
ip helper-address xx.xxx.xxx.xx
Since i have a second router of a similar operating function i am trying to find a way to make this service redundant. The two routers are connected to a single switch from which they receive the traffic from the cpes.
One problem is to redirect the user to a "mirror" interface of the second router if the first one fails. However Hsrp cannot be configured as far as i know to ip unnumbered interfaces.
The second problem that is pretty clear is that even if this could be done the second router would not have the appropriate info so as to route the CPE.
When the relay agent(router 1) is operating as an intermediate of the client/server communication, it creates the appropriate static route for as long as the lease time lasts. So the second agent(router) that doesnt take part in this would have no way to hanndle an already given ip of a connected cpe. It would need to wait untill the leased time exprires and the cpe reconnects to the second router.
I have done some research but havent found any example like this. Are there any ideas on how would that be possible?
Custom mobile apps are growing in demand; according to mobile app design services, some 75-80% of business owners are showing interest in having a mobile app for their business. Although, they help to improve the statistics of the business partially, thei...
(Pdf copy at the bottom)
Segmentation within SD-Access is enabled through the combined use of both Virtual Networks (VN), which are analogous to VRFs, and Cisco Scalable Group Tags (SGTs). VNs, like VRFs, provide comp...
The 2020 IT Blog Awards, hosted by Cisco, is now open for submissions through October 16. Submit your blog, vlog or podcast today. For more information, including category details, the process, past winners and FAQs, check out: https://www.cisco...
Hello,We have a pair of N3K-3064PQ-10GX and one of them acting as backup and we want to migrate from VyOS to it, we want to add 500x interface vlan and each interface vlan has its own ip/prefixes (for example /30 /29 ...) and we ahve 6-8x BGP session with...
We live in an age that is both thrilling and evolving substantially. A new trend/technology is always on rise even before the preceding has been used to its fullest potential. Although the concepts of digital transformation may seem over discussed, ...