Switch User Manual

22-50
Cisco ONS 15454 Procedure Guide, R7.0
November 2007
Chapter 22 DLPs A500 to A599
DLP- A544 Change the OSI Routing Mode
Caution LSP buffer sizes cannot be greater than the LAP-D MTU size within the OSI area.
Step 1 Verify the following:
• All L1/L2 virtual routers on the NE must reside in the same area. This means that all neighboring
virtual routers must have at least one common area address.
• For OSI L1/L2 to ES routing mode changes, only one L1/L2 virtual router and no more than one
subnet can be configured.
• For OSI L1 to ES routing mode changes, only one L1 virtual router and no more than one subnet
can be configured.
Step 2 In node view, click the Provisioning > OSI tabs.
Step 3 Choose one of the following routing modes:
• End System—The ONS 15454 performs OSI IS functions. It communicates with IS and ES nodes
that reside within its OSI area. It depends upon an IS L1/L2 node to communicate with IS and ES
nodes that reside outside its OSI area.
• Intermediate System Level 1/Level 2—The ONS 15454 performs IS functions. It communicates
with IS and ES nodes that reside within its OSI area. It also communicates with IS L1/L2 nodes that
reside in other OSI areas. Before choosing this option, verify the following:
– The node is connected to another IS Level 1/Level 2 node that resides in a different OSI area.
– The node is connected to all nodes within its area that are provisioned as IS L1/L2.
Note Changing a routing mode should be carefully considered. Additional information about OSI
ESs and ISs and the ES-IS and IS-IS protocols are provided in the “Management Network
Connectivity” chapter of the Cisco ONS 15454 Reference Manual.
Step 4 Although Cisco does not recommend changing the LSP (Link State Protocol Data Unit) buffer sizes, you
can adjust the buffers in the following fields:
• L1 LSP Buffer Size—Adjusts the Level 1 link state PDU buffer size.
• L2 LSP Buffer Size—Adjusts the Level 2 link state PDU buffer size.
Step 5 Return to your originating procedure (NTP).