ISIS over NBMA
Posted on April 4, 2010
When configuring ISIS over NBMA networks (such as ATM or FR) don’t forget that you probably configured static mapping such as
For ATM
interface ATM 0/0 pvc 0/109 protocol ip 1.1.1.1 broadcast
For FR
interface Serial 1/0 encapsulation frame-relay frame-relay map ip 1.1.1.1 109 broadcast
but you know that ISIS uses CLNS as a protocol and not IP so you won’t get adjacency there.
To correct this, you need to map CLNS also
interface ATM 0/0 pvc 0/109 protocol clns 00 broadcast
For FR
interface Serial 1/0 encapsulation frame-relay frame-relay map clns 109 broadcast
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