I think you are talking about SUP2+. This sup has some hardware limitaions of resourcses with compare to Sup4,5,5-10GE so that's why it is not supported on this SUP. It is working as that is built in the IOS but not recommended due to resources limitation.
There was a recent thread on the LAN Switching and Routing forum on this topic. The basic conclusion of the discussion was that EIGRP is not officially supported on the Sup II+. It may run on that platform, but is not officially supported and if you run it on that platform and have problems that Cisco is not obligated to provide any fixes for your problem.
Here is what I posted in that thread which documents that EIGRP is not officially supported on the Sup II+:
I found a Q&A document on the Cisco web site which is pretty specific about not supporting EIGRP. It includes these questions and answers:
Q. Does the Supervisor Engine II-Plus support all the Layer 2-4 features currently available on the Supervisor Engine III and IV?
A. No. The Supervisor Engine II-Plus supports all the Layer 2 features with basic Layer 3 services, Routing Information Protocol (RIP), static routes, Internetwork Packet Exchange (IPX) (in software), and AppleTalk (in software) for Layer 3 switching.
Q. What is included in the basic Layer 3 software image?
A. The basic Layer 3 software image supports all Layer 2 features, Layer 3 services, including access control lists (ACLs), quality of service (QoS), and Multicast, and Layer 3 switching including RIP v1 and v2, static routes, IPX, and AppleTalk support.
Q. Does the Supervisor Engine II-Plus support an enhanced Layer 3 software image?
A. No. The Supervisor Engine II-Plus does not support an enhanced Layer 3 software image for support for enhanced Layer 3 routing protocols like Open Shortest Path First (OSPF), Enhanced Interior Gateway Routing Protocol (EIGRP), and Intermediate System to Intermediate System (IS-IS).
Thanks for reply. I know it that documentation states it is not supported and I know it is working because I am using it, but .... sometimes I have some problems with it so I just wanted to know if this could be result of EIGRP/sup-II combination.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
Im studying the 100-105 book by Odom and am currently on the topic of Port security. I purchased a used 2960 and I'm trying to follow a...
While deploying a number of 18xx/2802/3802 model access points (APs), which run AP-COS as their operating platform. It can be observed on some occasions that while many of their access points were able to join the fabric WLC withou...
I am going to design and build an LAN network under a tunnel underground with long distance between the switches.
I will have 2 Catalyst switches and 8 Industrial IE3000, and they will be connected with fiber.
For now I am planning on use Layer-2 s...