146
Step Command
Remarks
3.
Set the overload bit.
set-overload
[
on-startup
[ [
start-from-nbr
system-id
[
timeout1
[
nbr-timeout
] ] ] |
timeout2
] [
allow
{
external
|
interlevel
} * ]
By default, the
overload bit is not
set.
Configuring the ATT bit
A Level-1-2 router sends Level-1 LSPs with an ATT bit to inform the Level-1 routers that it can reach other
areas.
Configuring IS-IS not to calculate the default route through the ATT bit
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IS-IS view.
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
N/A
3.
Configure IS-IS not to calculate
the default route through the
ATT bit.
ignore-att
By default, IS-IS uses the ATT bit
to calculate the default route.
Setting the ATT bit of Level-1 LSPs
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter IS-IS view.
isis
[
process-id
] [
vpn-instance
vpn-instance-name
]
N/A
3.
Set the ATT bit of Level-1 LSPs.
set-att
{
always
|
never
}
By default, the ATT bit is not set
for Level-1 LSPs.
Configuring the tag value for an interface
Perform this task when the link cost style is
wide
,
wide-compatible
, or
compatible
.
When IS-IS advertises a prefix with a tag value, IS-IS adds the tag to the IP reachability information TLV
of the prefix.
To configure the tag value for an interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type interface-number
N/A
3.
Configure the tag
value for the interface.
isis tag
tag
By default, the tag value of
the interface is not
configured.
