3com 8807 사용자 가이드

Four Switch 8800 Family series, Switch A, Switch B, Switch C and Switch D, which 
can perform the router functions and run OSPF, are located on the same segment, 
as shown in the following figure.

Configure Switch A and Switch C as DR and BDR respectively. The priority of 
Switch A is 100, which is the highest on the network, so it is elected as the DR. 
Switch C has the second highest priority, that is, 2, so it is elected as the BDR. The 
priority of Switch B is 0, which means that it cannot be elected as the DR. Switch D 
does not have a priority, which takes 1 by default.

View OSPF inter-area route 
summarization information 

display ospf [ process-id ] abr-summary 

Display the summary 
information of OSPF imported 
routes 

display ospf [ process-id ] asbr-summary [ ip-address mask ] 

Display OSPF interface 
information 

display ospf [ process-id ] interface 

Display OSPF errors 

display ospf [ process-id ] error 

Display OSPF Graceful Restart 
information 

display ospf [ process-id ] graceful-restart status 

Display the state of the global 
OSPF debugging switches and 
the state of the debugging 
switches for each process 

display debugging ospf 

Enable OSPF packet 
debugging 

debugging ospf packet [ ack | dd | hello | interface 
interface-type interface-number | request I update ] 

Disable OSPF packet 
debugging 

undo debugging ospf packet [ ack | dd | hello | interface 
interface-type interface-number | request I update ] 

Enable OSPF event debugging  debugging ospf event 

Disable OSPF event debugging  undo debugging ospf event 

Enable OSPF LSA packet 
debugging 

debugging ospf lsa-originate 

Disable OSPF LSA packet 
debugging 

undo debugging ospf lsa-originate 

Enable SPF debugging of 
OSPF 

debugging ospf spf 

Disable SPF debugging of 
OSPF 

Table 307   Display and debug OSPF