Purpose
Command or Action
Example:
• Hello padding applies to only this interface and not
to all interfaces.
RP/0/RP0/CPU0:router(config-isis-if)# hello-padding
sometimes
Specifies the length of time between hello packets that the
software sends.
hello-interval
seconds
[
level
{
1
|
2
}]
Example:
Step 6
RP/0/RP0/CPU0:router(config-isis-if)#hello-interval
6
Specifies the number of IS-IS hello packets a neighbor
must miss before the router should declare the adjacency
as down.
hello-multiplier multiplier
[
level
{
1
|
2
}]
Example:
RP/0/RP0/CPU0:router(config-isis-if)#
hello-multiplier 10
Step 7
• A higher value increases the networks tolerance for
dropped packets, but also may increase the amount
of time required to detect the failure of an adjacent
router.
• Conversely, not detecting the failure of an adjacent
router can result in greater packet loss.
Specifies that this system include authentication in the
hello packets and requires successful authentication of the
hello packet from the neighbor to establish an adjacency.
h ello-password
{
hmac-md5
|
text
} {
clear
|
encrypted
}
password
[
level
{
1
|
2
}] [
send-only
]
Example:
Step 8
RP/0/RP0/CPU0:router(config-isis-if)# hello-password
text clear mypassword
commit
Step 9
(Optional) Displays IS-IS adjacencies.
show isis
[
instance instance-id
]
adjacency t ype
interface- path-id
] [
detail
] [
systemid system-id
]
Step 10
Example:
RP/0/RP0/CPU0:router# show isis instance isp
adjacency
(Optional) Displays a log of the most recent adjacency
state transitions.
show isis adjacency-log
Example:
Step 11
RP/0/RP0/CPU0:router# show isis adjacency-log
(Optional) Displays information about the IS-IS interface.
show isis
[
instance instance-id
]
interface
[
type
interface-path-id
] [
brief
|
detail
] [
level
{
1
|
2
}]
Step 12
Example:
RP/0/RP0/CPU0:router# show isis interface
GigabitEthernet 0/1/0/1 brief
Routing Configuration Guide for Cisco NCS 6000 Series Routers, IOS XR Release 6.4.x
229
Implementing IS-IS
Tuning Adjacencies for IS-IS