Справочное Руководство для 3com S7906E

 

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cost: Cost for the sham link. It ranges from 1 to 65,535 and defaults to 1. 

dead-interval: Dead Interval in seconds. It ranges from 1 to 32,768 and defaults to 40. It must be equal 

to the dead interval of the router on the other end of the virtual link and be at least four times the hello 

interval. 

hello-interval: Interval at which the interface sends Hello packets. It ranges from 1 to 8,192 seconds and 

defaults to 10 seconds. It must be equal to the hello interval of the router on the other end of the virtual 

link. 

retrans-interval: Interval at which the interface retransmits LSAs. It ranges from 1 to 8,192 seconds and 

defaults to 5 seconds. 

delay: Delay interval before the interface sends an LSA. It ranges from 1 to 8,192 seconds and defaults 

to 1 second. 

simple [ cipher | plain ] password1: Uses simple authentication. If you specify neither the cipher nor 

the plain keyword, the password1 argument is a string of 1 to 8 characters. For the plain mode, the 

password1 argument is a string of 1 to 8 characters. For the cipher mode, the password1 argument can 

be either a string of 1 to 8 characters in plain text, or a string of 24 characters in cipher text. 

md5: Uses MD5 algorithm for authentication. 

hmac-md5: Uses HMAC-MD5 algorithm for authentication. 

key-id: Authentication key ID of the interface, in the range 1 to 255. It must be the same as that of the 

peer. 

cipher: Uses cipher text. 

plain: Uses plain text. 

password2: Password string, case-sensitive. If you specify neither the cipher nor the plain keyword, it 

is a string of 1 to 16 characters in plain text or a string of 24 characters in cipher text. For the plain mode, 

it is a string of 1 to 16 characters. For the cipher mode, it can be either a string of 1 to 16 characters in 

plain text, or a string of 24 characters in cipher text. 

Use the sham link command to configure a sham link. 

Use the undo sham link command with no optional keyword to remove a sham link. 

Use the undo sham link command with optional keywords to restore the defaults of the parameters for 

a sham link. 

If two PEs belong to the same AS and a backdoor link is present, a sham link can be established 

between them. 

For plain text authentication, the default authentication key type is plain. For authentication using MD5 

algorithm or HMAC-MD5 algorithm, the default authentication key type is cipher. 

# Create a sham link with the source address of 1.1.1.1 and the destination address of 2.2.2.2. 

<Sysname> system-view 

[Sysname] ospf 

[Sysname-ospf-1] area 0 

[Sysname-ospf-1-area-0.0.0.0] sham-link 1.1.1.1 2.2.2.2