Configuring The Att Bit; Configuring The Tag Value For An Interface - HP HPE FlexNetwork 7500 series Configuration Manual

Step
3. Set the overload bit.

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
1. Enter system view.
2. Enter IS-IS view.
3. Configure IS-IS not to
calculate the default route
through the ATT bit.
Setting the ATT bit of Level-1 LSPs
Step
1. Enter system view.
2. Enter IS-IS view
3. Set the ATT bit of 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
1. Enter system view.
2. Enter interface view.
3. Configure the tag value for
the interface.
Command
set-overload [ on-startup
[ [ start-from-nbr system-id [ timeout1
[ nbr-timeout ] ] ] | timeout2 |
wait-for-bgp [ timeout3 ] ] ] [ allow
{ external | interlevel } * ]
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
ignore-att
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
set-att { always | never }
Command
system-view
interface interface-type
interface-number
isis tag tag
157
Remarks
By default, the overload bit is
not set.
Remarks
N/A
N/A
By default, IS-IS uses the ATT
bit to calculate the default
route.
Remarks
N/A
N/A
By default, the ATT bit is not set
for Level-1 LSPs.
Remarks
N/A
N/A
By default, the tag value of the
interface is not configured.