PeraHoman
asked on
passive-interface commands on OSPF
How does passive-interface command work for VLANs?
passive-interface default
no passive-interface VLAN 10
To start:
Do all interfaces (physical OR logical) that have VLAN as an access or trunk participate in OSPF?
passive-interface default
no passive-interface VLAN 10
To start:
Do all interfaces (physical OR logical) that have VLAN as an access or trunk participate in OSPF?
ASKER
Continuing from this, what is the purpose of running a L2 Etherchannel between them and along with a SVI (VLAN 20)? This is a collapse core.
ASKER CERTIFIED SOLUTION
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SOLUTION
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ASKER
sw1
router ospf 10
passive-interface default
no passive-interface vlan 20
network 10.102.21.28 0.0.0.3 area 0
interface vlan 20
ip address 10.102.21.29 255.255.255.252
interface GigabitEthernet2/1/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 20,31
switchport mode trunk
switchport nonegotiate
spanning-tree portfast trunk
channel-group 1 mode on
end
interface GigabitEthernet1/1/1
description NMCIUMDF1-AC1-SW01 Gi1/1/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 20,31
switchport mode trunk
switchport nonegotiate
channel-group 1 mode on
end
interface Port-channel1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 20,31
switchport mode trunk
switchport nonegotiate
end
sw2
router ospf 10
passive-interface default
no passive-interface vlan 20
network 10.102.21.28 0.0.0.3 area 0
interface vlan 20
ip address 10.102.21.30 255.255.255.252
interface GigabitEthernet2/1/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 20,31
switchport mode trunk
switchport nonegotiate
spanning-tree portfast trunk
channel-group 1 mode on
end
interface GigabitEthernet1/1/1
description NMCIUMDF1-AC1-SW01 Gi1/1/1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 20,31
switchport mode trunk
switchport nonegotiate
channel-group 1 mode on
end
interface Port-channel1
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 20,31
switchport mode trunk
switchport nonegotiate
end
Pretty much a port channel between two switches with ospf no passive interface on vlan 20. What's happening here when the physical interfaces are passive, but they have vlan 20 as non-passive?