There are documentation where you can find a full configuration guide for setting up private-vlan. The first step of official guide is "seting VTP to transparent mode" because private-vlan doesn't supported by VTP versions 1 and 2.
Here you can see an example of configuring private-vlan with VTPv3. Also i decided to check an existence of the single spanning tree instance for primary and secondary rpivate VLANs.
Let's see topology: here we have four real Catalyst3750 swthces with MSTP in SWITCH_2 and PVST+ on SWITCH_3, SWITCH_4 and SWITCH_1.
SWITCH_2 is a root for entire topology. VLAN 10 manually "pruned" from trunk between SWITCH_1 and SWITCH_2 and has different from VLAN8 layer 2 topology.
We have two GNS3 routers R1 and R2 for testing connectivity in private-vlan. Router R2 connected to "Community" port, router R1 connected to "promiscous" port.
Configure router interfaces
R1#sh ip inter bri | e ass
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.1.1.1 YES manual up up
R2#sh ip inter bri | e ass
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.1.1.2 YES manual up up
Check our spanning-tree topology for VLANs 8 and 10:
SWITCH_1#sh span root | i VLAN0010|VLAN0008
VLAN0008 0 0012.d994.fd80 4 10 20 15 Gi1/0/25
VLAN0010 0 0012.d994.fd80 8 10 20 15 Gi1/0/27
SWITCH_2#sh span vl 10 | i Desg
Gi1/0/3 Desg FWD 20000 128.3 P2p Bound(PVST)
Gi1/0/11 Desg FWD 20000 128.11 P2p Bound(PVST)
SWITCH_2#sh span vl 8 | i Desg
Gi1/0/3 Desg FWD 20000 128.3 P2p Bound(PVST)
Gi1/0/11 Desg FWD 20000 128.11 P2p Bound(PVST)
Gi1/0/12 Desg FWD 20000 128.12 P2p Bound(PVST)
SWITCH_2#sh span root
Root Hello Max Fwd
MST Instance Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
MST0 0 0012.d994.fd80 0 10 20 15
SWITCH_4#sh span root | i VLAN0010|VLAN0008
VLAN0008 0 0012.d994.fd80 4 10 20 15 Gi1/0/11
VLAN0010 0 0012.d994.fd80 4 10 20 15 Gi1/0/11
SWITCH_3#sh span root | i VLAN0010|VLAN0008
VLAN0008 0 0012.d994.fd80 4 10 20 15 Gi1/0/27
VLAN0010 0 0012.d994.fd80 4 10 20 15 Gi1/0/27
We have configured VTPv3 and primary server mode on a SWITCH_3 and vlan 8 and 10 config on a server:
SWITCH_3#sh run vl 8
Building configuration...
Current configuration:
!
vlan 8
name test_private_primary
private-vlan primary
private-vlan association 9-10
end
SWITCH_3#sh run vl 10
Building configuration...
Current configuration:
!
vlan 10
name community_1
private-vlan community
end
Verifying VTP version 3:
SWITCH_3#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : MY_VTP
VTP Pruning Mode : Enabled
VTP Traps Generation : Disabled
Device ID : b8be.bfb1.f200
Feature VLAN:
--------------
VTP Operating Mode : Primary Server
Number of existing VLANs : 16
Number of existing extended VLANs : 0
Configuration Revision : 25
Primary ID : b8be.bfb1.f200
Primary Description : SWITCH_3
MD5 digest : 0xB8 0xF3 0xB2 0x8E 0x70 0x24 0xF4 0x65
0x86 0x89 0x18 0x4C 0x95 0x99 0xD1 0x1C
VTPv3 support Private-vlan, let's check Private-VLAN configuration on our switches:
Private-vlan operation requiered at least one promiscous port on a switch. We have a promiscous interface vlan 8 on a switch_3:
interface Vlan8
ip address 10.1.1.88 255.255.255.0
private-vlan mapping 9-10
end
Verify configured promiscous SVI:
SWITCH_3#sh inter priva mapping
Interface Secondary VLAN Type
--------- -------------- -----------------
vlan8 9 isolated
vlan8 10 community
Interfaces Gi1/0/13 configured to Routers:
SWITCH_3#sh int gi 1/0/13 switchport | i private
Administrative Mode: private-vlan host
Operational Mode: private-vlan host
Administrative private-vlan host-association: 8 (test_private_primary) 10 (community_1)
-----output omitted------
Operational private-vlan:
8 (test_private_primary) 10 (community_1)
SWITCH_3#
SWITCH_1#sh int gi 1/0/13 switchport | i private
Administrative Mode: private-vlan promiscuous
Operational Mode: private-vlan promiscuous
Administrative private-vlan host-association: 8 (test_private_primary) 9 (private_ISOLATED)
Administrative private-vlan mapping: 8 (test_private_primary) 9 (private_ISOLATED) 10 (community_1) 11 (community_2)
-----output omitted------
Operational private-vlan:
8 (test_private_primary) 9 (private_ISOLATED) 10 (community_1)
Verify VLANs 8 and 10 are configured as a private VLANS:
SWITCH_3#sh vl private-vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
8 9 isolated
8 10 community Gi1/0/13
SWITCH_1#sh vlan private-vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
8 9 isolated Gi1/0/13
8 10 community Gi1/0/13
SWITCH_2#sh vl private-vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
8 9 isolated
8 10 community
SWITCH_4#sh vlan private-vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
8 9 isolated
8 10 community
Verify connectivity absence in private VLAN:
R1#ping 10.1.1.2 r 10
Type escape sequence to abort.
Sending 10, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
..........
Success rate is 0 percent (0/10)
Add manually VLAN 10 to trunk interface gi 1/0/12 on a SWITCH_2:
SWITCH_2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SWITCH_2(config)#int gi 1/0/12
SWITCH_2(config-if)#swi tru all vl add 10
Remove manually VLAN 10 to trunk interface gi 1/0/12
SWITCH_2(config-if)#swi tru all vl rem 10
As you can see connectivity between two routers after we added VLAN 10:
R1#ping 10.1.1.2 r 1000
Type escape sequence to abort.
Sending 1000, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
...............Added vlan to trunk --->!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!..................... <-----removed VLAN from trunk
Let's make shure we have conncetivity in VLAN_8 and VLAN_10 without configured private-vlan.
Changing switchport mode to access on interfaces to routers:
Remooving config from VLAN 8 and 10
SWITCH_3(config-vlan)#vl 8
SWITCH_3(config-vlan)#no private-vlan primary
SWITCH_3(config-vlan)#no private-vlan association 9-10
SWITCH_3(config-vlan)#vl 10
SWITCH_3(config-vlan)#no private-vlan community
SWITCH_1(config-if)#swi acc vl 8
SWITCH_3(config-if)#swi acc vl 8
waiting a couple minute....
... and then set up access VLAN_10
SWITCH_1(config-if)#swi ac vl 10
SWITCH_1(config-if)#exit
SWITCH_1(config)#int gi 1/0/13
SWITCH_3(config-vlan)#int gi 1/0/13
SWITCH_3(config-if)#swi mo acc
SWITCH_3(config-if)#swi acc vl 10
SWITCH_3(config-if)#exit
After all manipulation we return all configuration as we have it in the beginning - Vlan_8 private primary, VLAN_10 private secondary.
Below you can see a connectivity test that was carried out, while we have configured VLANs
R1#ping 10.1.1.2 r 1000000
Type escape sequence to abort.
Sending 1000, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
...............!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!..........................................................
....no pings while changing VLAN to access_8...............!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
---output omitted---
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!
R1#ping 10.1.1.2 r 1000000
Type escape sequence to abort.
Sending 1000000, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!no pings while changing VLAN to access_10.
.................!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
---output omitted---
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!no pings when changed to switchport mode private.
......................................................................
Here you can see an example of configuring private-vlan with VTPv3. Also i decided to check an existence of the single spanning tree instance for primary and secondary rpivate VLANs.
Let's see topology: here we have four real Catalyst3750 swthces with MSTP in SWITCH_2 and PVST+ on SWITCH_3, SWITCH_4 and SWITCH_1.
SWITCH_2 is a root for entire topology. VLAN 10 manually "pruned" from trunk between SWITCH_1 and SWITCH_2 and has different from VLAN8 layer 2 topology.
We have two GNS3 routers R1 and R2 for testing connectivity in private-vlan. Router R2 connected to "Community" port, router R1 connected to "promiscous" port.
Configure router interfaces
R1#sh ip inter bri | e ass
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.1.1.1 YES manual up up
R2#sh ip inter bri | e ass
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.1.1.2 YES manual up up
Check our spanning-tree topology for VLANs 8 and 10:
SWITCH_1#sh span root | i VLAN0010|VLAN0008
VLAN0008 0 0012.d994.fd80 4 10 20 15 Gi1/0/25
VLAN0010 0 0012.d994.fd80 8 10 20 15 Gi1/0/27
SWITCH_2#sh span vl 10 | i Desg
Gi1/0/3 Desg FWD 20000 128.3 P2p Bound(PVST)
Gi1/0/11 Desg FWD 20000 128.11 P2p Bound(PVST)
SWITCH_2#sh span vl 8 | i Desg
Gi1/0/3 Desg FWD 20000 128.3 P2p Bound(PVST)
Gi1/0/11 Desg FWD 20000 128.11 P2p Bound(PVST)
Gi1/0/12 Desg FWD 20000 128.12 P2p Bound(PVST)
SWITCH_2#sh span root
Root Hello Max Fwd
MST Instance Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
MST0 0 0012.d994.fd80 0 10 20 15
SWITCH_4#sh span root | i VLAN0010|VLAN0008
VLAN0008 0 0012.d994.fd80 4 10 20 15 Gi1/0/11
VLAN0010 0 0012.d994.fd80 4 10 20 15 Gi1/0/11
SWITCH_3#sh span root | i VLAN0010|VLAN0008
VLAN0008 0 0012.d994.fd80 4 10 20 15 Gi1/0/27
VLAN0010 0 0012.d994.fd80 4 10 20 15 Gi1/0/27
We have configured VTPv3 and primary server mode on a SWITCH_3 and vlan 8 and 10 config on a server:
SWITCH_3#sh run vl 8
Building configuration...
Current configuration:
!
vlan 8
name test_private_primary
private-vlan primary
private-vlan association 9-10
end
SWITCH_3#sh run vl 10
Building configuration...
Current configuration:
!
vlan 10
name community_1
private-vlan community
end
Verifying VTP version 3:
SWITCH_3#sh vtp status
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : MY_VTP
VTP Pruning Mode : Enabled
VTP Traps Generation : Disabled
Device ID : b8be.bfb1.f200
Feature VLAN:
--------------
VTP Operating Mode : Primary Server
Number of existing VLANs : 16
Number of existing extended VLANs : 0
Configuration Revision : 25
Primary ID : b8be.bfb1.f200
Primary Description : SWITCH_3
MD5 digest : 0xB8 0xF3 0xB2 0x8E 0x70 0x24 0xF4 0x65
0x86 0x89 0x18 0x4C 0x95 0x99 0xD1 0x1C
VTPv3 support Private-vlan, let's check Private-VLAN configuration on our switches:
Private-vlan operation requiered at least one promiscous port on a switch. We have a promiscous interface vlan 8 on a switch_3:
interface Vlan8
ip address 10.1.1.88 255.255.255.0
private-vlan mapping 9-10
end
Verify configured promiscous SVI:
SWITCH_3#sh inter priva mapping
Interface Secondary VLAN Type
--------- -------------- -----------------
vlan8 9 isolated
vlan8 10 community
Interfaces Gi1/0/13 configured to Routers:
SWITCH_3#sh int gi 1/0/13 switchport | i private
Administrative Mode: private-vlan host
Operational Mode: private-vlan host
Administrative private-vlan host-association: 8 (test_private_primary) 10 (community_1)
-----output omitted------
Operational private-vlan:
8 (test_private_primary) 10 (community_1)
SWITCH_3#
SWITCH_1#sh int gi 1/0/13 switchport | i private
Administrative Mode: private-vlan promiscuous
Operational Mode: private-vlan promiscuous
Administrative private-vlan host-association: 8 (test_private_primary) 9 (private_ISOLATED)
Administrative private-vlan mapping: 8 (test_private_primary) 9 (private_ISOLATED) 10 (community_1) 11 (community_2)
-----output omitted------
Operational private-vlan:
8 (test_private_primary) 9 (private_ISOLATED) 10 (community_1)
Verify VLANs 8 and 10 are configured as a private VLANS:
SWITCH_3#sh vl private-vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
8 9 isolated
8 10 community Gi1/0/13
SWITCH_1#sh vlan private-vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
8 9 isolated Gi1/0/13
8 10 community Gi1/0/13
SWITCH_2#sh vl private-vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
8 9 isolated
8 10 community
SWITCH_4#sh vlan private-vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
8 9 isolated
8 10 community
Verify connectivity absence in private VLAN:
R1#ping 10.1.1.2 r 10
Type escape sequence to abort.
Sending 10, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
..........
Success rate is 0 percent (0/10)
Add manually VLAN 10 to trunk interface gi 1/0/12 on a SWITCH_2:
SWITCH_2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
SWITCH_2(config)#int gi 1/0/12
SWITCH_2(config-if)#swi tru all vl add 10
Remove manually VLAN 10 to trunk interface gi 1/0/12
SWITCH_2(config-if)#swi tru all vl rem 10
As you can see connectivity between two routers after we added VLAN 10:
R1#ping 10.1.1.2 r 1000
Type escape sequence to abort.
Sending 1000, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
...............Added vlan to trunk --->!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!..................... <-----removed VLAN from trunk
Let's make shure we have conncetivity in VLAN_8 and VLAN_10 without configured private-vlan.
Changing switchport mode to access on interfaces to routers:
Remooving config from VLAN 8 and 10
SWITCH_3(config-vlan)#vl 8
SWITCH_3(config-vlan)#no private-vlan primary
SWITCH_3(config-vlan)#no private-vlan association 9-10
SWITCH_3(config-vlan)#vl 10
SWITCH_3(config-vlan)#no private-vlan community
Seting interfaces to R1 and R2 to access mode: first access VLAN_8
SWITCH_1(config)#int gi 1/0/13
SWITCH_1(config-if)#swi mo accSWITCH_1(config-if)#swi acc vl 8
SWITCH_3(config)#int gi 1/0/13
SWITCH_3(config-if)#swi mo accSWITCH_3(config-if)#swi acc vl 8
waiting a couple minute....
... and then set up access VLAN_10
SWITCH_1(config-if)#swi ac vl 10
SWITCH_1(config-if)#exit
SWITCH_1(config)#int gi 1/0/13
SWITCH_3(config-vlan)#int gi 1/0/13
SWITCH_3(config-if)#swi mo acc
SWITCH_3(config-if)#swi acc vl 10
SWITCH_3(config-if)#exit
After all manipulation we return all configuration as we have it in the beginning - Vlan_8 private primary, VLAN_10 private secondary.
Below you can see a connectivity test that was carried out, while we have configured VLANs
R1#ping 10.1.1.2 r 1000000
Type escape sequence to abort.
Sending 1000, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
...............!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!..........................................................
....no pings while changing VLAN to access_8...............!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
---output omitted---
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!
R1#ping 10.1.1.2 r 1000000
Type escape sequence to abort.
Sending 1000000, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!no pings while changing VLAN to access_10.
.................!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
---output omitted---
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!no pings when changed to switchport mode private.
......................................................................
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