Route leaking – H3C Technologies H3C SR8800 User Manual
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Figure 50 IS-IS topology
shows another IS-IS topology. The Level-1-2 routers connect to the Level-1 and Level-2 routers,
and form the IS-IS backbone together with the Level-2 routers. No area is defined as the backbone in this
topology. The backbone comprises all contiguous Level-2 and Level-1-2 routers which can reside in
different areas.
Figure 51 IS-IS topology
NOTE:
The IS-IS backbone does not need to be a specific Area.
Both the Level-1 and Level-2 routers use the SPF algorithm to generate the shortest path tree (SPT).
Route leaking
An IS-IS routing domain is comprised of only one Level-2 area and multiple Level-1 areas. A Level-1 area
consists of a group of Level-1 routers and is connected with a Level-2 area rather than other Level-1 areas.
- H3C SR6600-X H3C SR6600 H3C WX6000 Series Access Controllers H3C WX5000 Series Access Controllers H3C WX3000 Series Unified Switches H3C LSWM1WCM10 Access Controller Module H3C LSWM1WCM20 Access Controller Module H3C LSQM1WCMB0 Access Controller Module H3C LSRM1WCM2A1 Access Controller Module H3C LSBM1WCM2A0 Access Controller Module