On SONET/SDH interface so-0/0/0, enable IS-IS for Level 1 only. With this configuration, tracing messages periodically indicate that IS-IS is creating Level 2 link-state PDUs. However, because IS-IS for Level 2 is disabled, these link-state PDUs are never distributed to neighboring routers.
- protocols {
-
- isis {
-
- traceoptions {
- file isis size 1m files 10;
- flag spf;
- flag lsp;
- flag error;
- }
-
- interface so-0/0/0 {
-
- level 2 {
- disable;
- }
- }
- }
- }