using "reserved" IPv6 space
olipro at 8.c.9.b.0.7.4.0.184.108.40.206.ip6.arpa
Mon Jul 16 19:39:46 UTC 2012
On Monday 16 July 2012 18:26:08 Rajendra Chayapathi wrote:
> On the HSRP/ND part , this all falls in the First Hop redundancy areana
> and can be achieved via any of the following and each has its merits and
> 1) Using ND -- need to tune the "IPv6 nd reachable time" to achieve the
> faster failover
> 2) Using any of the First hop redundancy protocol ( HSRP, VRRP , GLBP)
> 3) Default route selection.
In all honesty, I think using ND as the failover method is a generally bad
idea - you have no way of ensuring all endpoints take note of or honour the
router preference flag.
Additionally, having a 1 second validity lifetime is going to create a lot of
ICMPv6 spam across the segment - big deal? perhaps not. But when contrasted
with the fact that it can be wholly avoided using one of the aforementioned
redundancy protocols, why would you do it?
Additionally, as an alternative to RAs, you can simply point default at the
all-routers anycast address.
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