12-03-2009 01:41 AM - edited 03-04-2019 06:52 AM
Hi All
I wonder if any body could answer any/all of the following questions or point me in the direction where I might find this information? I am currently looking on the Cisco site and via Google, but no luck with answers so far
If anybody could answer any of these questions it would be much appreciated.
Best Regards,
Michael
12-03-2009 04:55 AM
Hello Michael,
>> Is there a maximum number of VRF's that can be configured on a router and is this figure platform/OS dependant?
yes I haven't a link to a table of these limits but they exist
>> Is there a maximum number of GRE tunnels that can be configureed on a router and is this figure platform/OS dependant?
yes, it depends from the IDB limits a table that contains the limits see
https://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_tech_note09186a0080094322.shtml
>> Can bandwidth limits be set on GRE Tunnels in both directions?
not totally clear to me, you can police or shape traffic on physical interfaces in outbound direction, the traffic classes can represent different GRE tunnels and/or you can take advantage of hierarchical QoS when it is supported
>>
GRE tunnels are more handy for routing purposes and they can be put inside IPSec, however again as above
IPSec introduces further performance penalties on devices without an hardware based encryption engine
>> IS VRF and GRE functionality available on all routers, from 800's up?
GRE is supported on 800 series routers and above, VRFs may start from something else
search by feature: VRF lite
notice that VRF lite is only a subset of full MPLS L3 VPN that doesn't use MPLS forwarding and control planes
877 and other are listed on supported platforms
Hope to help
Giuseppe
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