3Com Switch 7750 Configuration Guide

IS-IS Basic Configuration 341
predefined. If domain authentication is also required on other routers at the
backbone layer (Level-2), the authentication works normally only if the
authentication mode and password of these routers are the same as those of the
neighboring routers.
Configuring IS-IS to use an MD5 algorithm compatible with the switches
of other manufacturers
To enable IS-IS MD5 authentication between the switch and the switches of other
manufacturers, you must use the following commands to configure IS-IS to use an
MD5 algorithm compatible with the switches of other manufacturers.
Adding an Interface to a
Mesh Group
On an NBMA network, a router floods a new LSP received from an interface to
other interfaces of the router. This can cause repeated LSP flooding on a
high-connectivity network with multiple point-to-point links, which is a waste of
the bandwidth.
To avoid this problem, you can add interfaces into a mesh group. The interfaces in
the group will flood the new LSPs to only the interfaces outside the mesh group.
Table 273 Configure authentication
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Define the area
authentication mode
area-authentication-mode { si
mple | md5 } password [ ip | osi ]
Optional
Define the domain
authentication mode
domain-authentication-mode {
simple | md5 } password [ ip |
osi ]
Optional
By default, no password is
defined and no
authentication is enabled.
Table 274 Configure IS-IS to use an MD5 algorithm compatible with the switches of other
manufacturers
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Configure IS-IS to use an MD5
algorithm compatible with the switches
of other manufacturers
md5-compatible Optional
Configure IS-IS to use the default MD5
algorithm
undo
md5-compatible
Optional
By default, the private MD5
algorithm is used.
Table 275 Add an interface to a mesh group
Operation Command Description
Enter system view system-view -
Enter interface view interface interface-type
interface-number
Required