On Thu, 4 Aug 2011, Olivier CALVANO wrote:
I'm looking for information on configuring ISIS
on cisco 6500/Sup720-3BXL:
I have two Cisco 6500/Sup720-3BXL connected by
Layer 2 link of 1 Gbit.
My config:
C6500-1:
interface GigabitEthernet1/2
mtu 2000
ip address 192.168.100.1 255.255.255.252
ip router isis
speed nonegotiate
mpls label protocol ldp
tag-switching ip
clns mtu 1500
router isis
net 49.0001.0000.0000.0424.00
is-type level-2-only
metric-style wide
redistribute connected
C6500-2:
interface GigabitEthernet3/2
mtu 2000
ip address 192.168.100.2 255.255.255.252
ip router isis
speed nonegotiate
mpls label protocol ldp
mpls ip
router isis
net 49.0001.0000.0000.0421.00
is-type level-2-only
metric-style wide
redistribute connected
!
Soon, I will add a new link between the two for backup.
This link is on port Gigabit but there are only 100 Mbits of Commit
I would like the cisco C6500 use it only on the 1 Gb link does not work
more.
I will add in config:
C6500-1:
interface GigabitEthernet1/3
mtu 2000
ip address 192.168.50.1 255.255.255.252
ip router isis
speed nonegotiate
mpls label protocol ldp
tag-switching ip
clns mtu 1500
C6500-2:
interface GigabitEthernet3/3
mtu 2000
ip address 192.168.50.2 255.255.255.252
ip router isis
speed nonegotiate
mpls label protocol ldp
mpls ip
How can I do to make it a priority is having an link compared to another?
Set ISIS metrics on the interfaces. Lower numbers are favored. For example,
to favor the first link:
C6500-1:
interface GigabitEthernet1/2
isis metric 100
interface GigabitEthernet1/3
isis metric 200
C6500-2:
interface GigabitEthernet3/2
isis metric 100
interface GigabitEthernet3/3
isis metric 200
Pay attention to how your metrics interact on your various links. The "show
isis topology" command should show the existing interface metrics.
Note that metrics can be (& perhaps must be) configured distinctly for IPv4 &
IPv6.
________________________________________________________________________
Jay Ford, Network Engineering Group, Information Technology Services
University of Iowa, Iowa City, IA 52242
email: [email protected], phone: 319-335-5555, fax: 319-335-2951
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