Tuning And Optimizing Is-Is Networks; Configuration Prerequisites; Specifying The Interval For Sending Is-Is Hello Packets; Specifying The Is-Is Hello Multiplier - HP FlexFabric 12900E Series Configuration Manual
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Also See for FlexFabric 12900E Series:
- Installation manual (152 pages) ,
- Command reference manual (213 pages)
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Step
2.
Enter
unicast address family
view.
3.
Configure
leaking from Level-1
to Level-2.
4.
Configure
leaking from Level-2
to Level-1.
Tuning and optimizing IS-IS networks
Configuration prerequisites
Before you tune and optimize IS-IS networks, complete the following tasks:
•
Configure IP addresses for interfaces to ensure IP connectivity between neighboring nodes.
•
Enable IS-IS.
Specifying the interval for sending IS-IS hello packets
If a neighbor does not receive any hello packets from the router within the advertised hold time, it
considers the router down and recalculates the routes. The hold time is the hello multiplier multiplied
by the hello interval.
To specify the interval for sending hello packets:
Step
1.
Enter system view.
2.
Enter interface view.
3.
Specify
sending hello packets.
Specifying the IS-IS hello multiplier
The hello multiplier is the number of hello packets a neighbor must miss before it declares that the
router is down.
If a neighbor receives no hello packets from the router within the advertised hold time, it considers
the router down and recalculates the routes. The hold time is the hello multiplier multiplied by the
hello interval.
On a broadcast link, Level-1 and Level-2 hello packets are advertised separately. You must set a
hello multiplier for each level.
Command
a
isis
IS-IS
IPv4
vpn-instance-name ]
b
cost-style { wide | wide-compatible }
c
address-family ipv4 [ unicast ]
import-route
route
[ filter-policy { ipv4-acl-number | prefix-list
prefix-list-name
route-policy-name } | tag tag ] *
import-route
route
[ filter-policy { ipv4-acl-number | prefix-list
prefix-list-name
route-policy-name } | tag tag ] *
Command
system-view
interface
interface-number
the
interval
for
isis timer hello seconds [ level-1
| level-2 ]
[
process-id
]
[
vpn-instance
isis
level-1
into
|
isis
level-2
into
|
interface-type
147
Remarks
N/A
level-2
By
default,
advertises routes from
route-policy
Level-1 to Level-2.
level-1
By default, IS-IS does not
advertise
route-policy
Level-2 to Level-1.
Remarks
N/A
N/A
The default setting is 10 seconds.
The interval between hello packets
sent by the DIS is 1/3 the hello
interval set with the isis timer
hello command.
IS-IS
routes
from
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Troubleshooting
