08-17-2020 05:03 AM
Hi,
after migration to an SVI design, the 'old' vlan 1 interfaces are not reachable.
The old design was as follows:
Internet - ASA ------- 2960-X-SW 1 ------Trunk to ------- 2960-X-SW 2 only vlan 1 one subnet.
After introducing the vlan design vlan 10, vlan 20, etc. all works fine, except the old vlan 1 IP-interfaces on SW1 and SW 2 aren't not reachable from the new vlans 10 and 20 (for example ping from a client in vlan 10 or vlan 20 fails!)
During migration SW was chosen as SVI (routing) switch, so the new design is as follows:
vlan 10, 20 clients
and transfer to ASA/Internet
!
SVI-2960-X-SW 1
! ! (= trunk)
x.x.134.0 !
! !
Internet ----------ASA 2960-X-SW 2
(with vlan 10, 20 clients)
The relevant switch configuration are as follows:
Config SVI Switch:
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime
service password-encryption
!
hostname SVI Switch
!
interface GigabitEthernet1/0/1
switchport access vlan 10
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/2
switchport access vlan 20
switchport mode access
spanning-tree portfast
!
! output omitted
!
interface GigabitEthernet1/0/50
shutdown
!
interface TenGigabitEthernet1/0/1
description core: 3OG->4OG
switchport mode trunk
switchport nonegotiate
udld port
ip dhcp snooping trust
!
!
interface Vlan1
ip address x.x.134.1 255.255.255.0
!
interface Vlan10
ip address x.x.10.1 255.255.255.0
!
interface Vlan20
ip address x.x.20.1 255.255.255.0
ip helper-address x.x.x.x
!
!
ip route 0.0.0.0 0.0.0.0 x.x.134.5
! to Internet
!
no vstack
!
Config SW connect via trunk to SVI switch
no service pad
service timestamps debug datetime msec
service timestamps log datetime
service password-encryption
!
hostname SW-via Trunk
!
!
interface GigabitEthernet1/0/1
switchport access vlan 20
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/2
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet1/0/3
switchport access vlan 10
switchport mode access
spanning-tree portfast
!
!
… Output omitted
!
!
interface GigabitEthernet1/0/49
!
interface GigabitEthernet1/0/50
interface TenGigabitEthernet1/0/1
switchport mode trunk
switchport nonegotiate
udld port
ip dhcp snooping trust
!
interface TenGigabitEthernet1/0/2
!
interface Vlan1
ip address x.x.134.10 255.255.255.0
!
!
ip route 0.0.0.0 0.0.0.0 x.x.134.5
!
end
Any ideas, many thx in advance for your help.
Pete
Solved! Go to Solution.
08-17-2020 05:24 AM
Hi there,
The switch 'SW-via Trunk' does not know how to reach VLANs 10 and 20. you need to add entires to is route table:
! ip route x.x.10.x 255.255.255.0 x.x.134.1 ip route x.x.20.x 255.255.255.0 x.x.134.1 !
...(you will need to fill in the x's !)
The ASA will need to be configured to NAT your new VLANs. It will also need to know how to reach the new VLANs. Add route entries for those subnets directing traffic to x.x.134.1
cheers,
Seb.
08-17-2020 05:24 AM
Hi there,
The switch 'SW-via Trunk' does not know how to reach VLANs 10 and 20. you need to add entires to is route table:
! ip route x.x.10.x 255.255.255.0 x.x.134.1 ip route x.x.20.x 255.255.255.0 x.x.134.1 !
...(you will need to fill in the x's !)
The ASA will need to be configured to NAT your new VLANs. It will also need to know how to reach the new VLANs. Add route entries for those subnets directing traffic to x.x.134.1
cheers,
Seb.
08-18-2020 02:44 AM
08-22-2020 03:44 AM
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