Re: IS-IS Ether type

could you filter based on the MAC:

Well-Known MAC Addresses

ISH packets are sent out to all IS-IS-enabled interfaces. On LANs they
are sent out periodically, destined to a special multicast address.
Routers will become neighbors when they see themselves in their
neighbor's hello packets and link authentication information matches.

On LANs, IS-IS PDUs are forwarded to the following well-known MAC addresses:

AllL1ISs 01-80-C2-00-00-14The multidestination address "All Level 1
Intermediate Systems"

AllL2ISs 01-80-C2-00-00-15The multidestination address "All Level 2
Intermediate Systems"

AllIntermediateSystems 09-00-2B-00-00-05The multidestination address
"All Intermediate Systems" used by ISO 9542

AllEndSystems 09-00-2B-00-00-04The multidestination address "All End
Systems" used by ISO 9542

--
Garry L. Baker
"With sufficient thrust, pigs fly just fine..." - RFC 1925
On Sat, Oct 1, 2011 at 3:12 PM, Routing Freak <routingfreak_at_gmail.com> wrote:
> Hi fellas,
>
> How to block IS-IS Control Plane packets using access-list. What is the
> ether type for IS-IS Packets. Can anyone help me out on how to prevent IS-IS
> traffic. We cannot use IP ACL to block IS-IS traffic. So we have to write
> MAC ACL to prevent ISIS control packets ?
>
> Thank You
>
>
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