>I have 2 6509 in the Core Layer, 2 in the Distribution Layer, and 3524s in
>the Access-Layer.
>All 6509 with Layer 3. All links redundand with Gigabit
>My Question is:
>How long is the Convergence time if a link fails?
>Routing Protocol EIGRP or OSPF.
>
>6509 6509 Core
> | \/ |
> 6509 6509 Distribution
> | \/ |
>3524 3524 Access(50 Switches)
>
>thx
>
>Timo
>
How do you define convergence? A single device knowing it has an
alternate path through a neighbor? Devices knowing the topology of
non-directly-connected devices? What about router vs. switch? Are
all timers at default values? Do the switches use plain STP or
anything to speed it, such as UplinkFast?
Are optimizations allowed to speed convergence? What amount of
bandwidth and processing power are you willing to give up for faster
convergence? Is faster convergence worth having parallel links
(FastEtherChannel or parallel load-balanced routed interfaces)?
What about the host perspective on convergence if an ingress device
fails? For that matter, are the ingress devices routing or switching?
It might be better to state your objective and then see if a
configuration meets the requirements. In other words, what problem
are you trying to solve?
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