Reference Guide

852 | Intermediate System to Intermediate System (IS-IS)
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Command Mode
ROUTER ISIS (for IPv4)
CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
Usage
Information
Set the overload bit when a router experiences problems, such as a memory shortage due to an
incomplete link state database which can result in an incomplete or inaccurate routing table. If you set
the overload bit in its LSPs, other routers ignore the unreliable router in their SPF calculations until the
router has recovered.
Command
History
show config
e
Display the changes you made to the IS-IS configuration. Default values are not shown.
Syntax
show config
Command Modes
ROUTER ISIS (for IPv4)
CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
Examples
Figure 28-2. Command Example: show config (router-isis mode)
Figure 28-3. Command Example: show config (address-family-ipv6 mode)
show isis database
e
Display the IS-IS link state database.
Syntax
show isis database [level-1 | level-2] [local] [detail | summary] [lspid]
Version 7.8.1.0 Introduced MT ISIS support
Version 6.3.1.0 Introduced
FTOS(conf-router_isis)#show config
!
router isis
clns host ISIS 49.0000.0001.F100.E120.0013.00
log-adjacency-changes
net 49.0000.0001.F100.E120.0013.00
!
address-family ipv6 unicast
maximum-paths 16
multi-topology transition
set-overload-bit
spf-interval level-1 100 15 20
spf-interval level-2 120 20 25
exit-address-family
Identifies that Multi-Topology
IS-IS is enabled in transition
mode
FTOS(conf-router_isis-af_ipv6)#show conf
!
address-family ipv6 unicast
maximum-paths 16
multi-topology transition
set-overload-bit
spf-interval level-1 100 15 20
spf-interval level-2 120 20 25
exit-address-family
Identifies that Multi-Topology
IS-IS is enabled in transition
mode