11-05-2019 01:09 PM
My datacenter is looking at installing a second ASR 1001 alongside our current external router and configuring HSRP, however, for administrative reasons we only have a /30 on the interface leading out to the cloud. Is there a way to make this work with what we have or do I need to beg, borrow, or steal for a /29 subnet?
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11-05-2019 01:22 PM
Consider using VRRP where the VIP can be the physical IP on one of the routers.
Or yes, find a /29.
Jon
11-05-2019 01:22 PM
Consider using VRRP where the VIP can be the physical IP on one of the routers.
Or yes, find a /29.
Jon
11-05-2019 01:39 PM
11-05-2019 02:42 PM
Haven't configured VRRP on ASR's but why does it leave you one short ?
A /30 gives you two IPs and the virtual IP with VRRP does not have to be a separate IP as it does with HSRP ie. it can be one of the physical IPs you assign to an interface.
Jon
11-05-2019 02:51 PM
Because one of the IPs is already being used by the distant end in that subnet.
11-05-2019 03:01 PM
Okay, that makes sense.
A /29 it is then :)
Jon
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