3Com Switch 7750 Configuration Guide Guide

IS-IS Basic Configuration 327
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.
Configuring Overload
Tag
A failure of a router in an IS-IS domain will cause errors in the routing of the whole
domain. To avoid this, you can configure the overload for the routers.
Define the area
authentication mode
area-authentication-mode {
simple | md5 } password [ ip |
osi ]
Optional
Define the domain
authentication mode
domain-authentication-mo
de { simple | md5 } password
[ ip | osi ]
Optional
By default, no password is
defined and no authentication
is enabled.
Table 257 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
3Com-compatible MD5
algorithm is used.
Table 256 Configure authentication
Operation Command Description
Table 258 Add an interface to a mesh group
Operation Command Description
Enter system view system-view -
Enter interface view
interface interface-type
interface-number
Required
Add an interface to a mesh
group
isis mesh-group {
mesh-group-number |
mesh-blocked }
Optional
By default, LSPs are flooded
on interfaces normally.