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nhrp authentication
Use nhrp authentication to configure an NHRP packet authentication key.
Use undo nhrp authentication to restore the default.
Syntax
nhrp authentication { cipher | simple } string
undo nhrp authentication
Default
No NHRP packet authentication key is configured. NHRP nodes do not authenticate NHRP packets
received from each other.
Views
mGRE tunnel interface view
Predefined user roles
network-admin
Parameters
cipher: Specifies an authentication key in encrypted form.
simple: Specifies an authentication key in plaintext form. For security purposes, the key specified in
plaintext form will be stored in encrypted form.
string: Specifies the key string. Its plaintext form is a case-sensitive string of 1 to 8 characters. Its
encrypted form is a case-sensitive string of 1 to 41 characters.
Usage guidelines
After an NHRP packet authentication key is configured for a tunnel interface, the tunnel interface
adds the key in packets sent to the peer. The tunnel interface also uses the key to authenticate
NHRP packets it receives. If a packet fails the authentication, the packet will be dropped.
For mGRE tunnels to be established successfully, configure the same NHRP authentication key for
all NHCs and NHSs in the same mGRE network.
Examples
# On interface Tunnel1, set the NHRP packet authentication key to 123456.
<Sysname> system-view
[Sysname] interface tunnel 1 mode mgre
[Sysname-Tunnel1] nhrp authentication simple 123456
Related commands
interface tunnel (Layer 3—IP Services Command Reference)
nhrp holdtime
Use nhrp holdtime to configure the holdtime for NHRP mapping entries.
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