04-22-2020 02:14 PM
Hey guys. Hope everyone is doing well in these crazy times. I attempted to set up a Router on a Stick setup via instructions on youtube. The instructor did so on packet tracer but I wanted to give it a go on my physical lab. Unfortunately, after completing his tutorial, I cannot ping between the different vlans (each on it's own physical interface on my switch). To clarify, I am trying to set things up as pictured below and as far as I can tell, I have things configured identically. I only have two laptops to use as hosts so I figured if I just plug one int fa0/2 and fa0/3 on the switch, I should be able to ping between both but it won't work. This is not an issue of firewalls blocking pings. It is something in my config but I just don't know what. I made sure to set up trunking and encapsulation. Below the pic is my router and switch configs. Is it possible there are leftover configs on my switch or router that could be mucking up the works? Also, does what is displaying in the show ip route command look correct for router? I don't know why there is mention of /32 subnets when all I have entered at any point has been 255.255.255.0 masks. Thank you fellas!
Router configs
ROAS_Router#show running-config
Building configuration...
Current configuration : 1544 bytes
!
! Last configuration change at 20:01:41 UTC Wed Apr 22 2020
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname ROAS_Router
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
dot11 syslog
ip source-route
!
!
!
!
!
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
crypto pki token default removal timeout 0
!
!
!
!
license udi pid CISCO1841 sn FTX144200UG
!
redundancy
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
ip address 192.168.1.3 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.10.1 255.255.255.0
!
interface FastEthernet0/0.20
encapsulation dot1Q 20
ip address 192.168.20.1 255.255.255.0
!
interface FastEthernet0/0.30
encapsulation dot1Q 30
ip address 192.168.30.1 255.255.255.0
!
interface FastEthernet0/0.55
encapsulation dot1Q 55
ip address 192.168.55.1 255.255.255.0
!
interface FastEthernet0/0.77
encapsulation dot1Q 77
ip address 192.168.77.1 255.255.255.0
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0/0
no ip address
shutdown
no fair-queue
!
interface Serial0/1/0
no ip address
shutdown
!
ip default-gateway 192.168.77.1
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip route 192.168.1.0 255.255.255.0 192.168.2.2
!
!
!
!
!
!
!
control-plane
!
!
!
line con 0
logging synchronous
line aux 0
line vty 0 4
login
transport input all
!
scheduler allocate 20000 1000
end
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ROAS_Router#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.1.0/24 is directly connected, FastEthernet0/0
L 192.168.1.3/32 is directly connected, FastEthernet0/0
192.168.10.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.10.0/24 is directly connected, FastEthernet0/0.10
L 192.168.10.1/32 is directly connected, FastEthernet0/0.10
192.168.20.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.20.0/24 is directly connected, FastEthernet0/0.20
L 192.168.20.1/32 is directly connected, FastEthernet0/0.20
192.168.30.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.30.0/24 is directly connected, FastEthernet0/0.30
L 192.168.30.1/32 is directly connected, FastEthernet0/0.30
192.168.55.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.55.0/24 is directly connected, FastEthernet0/0.55
L 192.168.55.1/32 is directly connected, FastEthernet0/0.55
192.168.77.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.77.0/24 is directly connected, FastEthernet0/0.77
L 192.168.77.1/32 is directly connected, FastEthernet0/0.77
Switch configs
Switch#show running-config
Building configuration...
Current configuration : 1678 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Switch
!
!
no aaa new-model
system mtu routing 1500
ip subnet-zero
!
!
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface FastEthernet0/1
switchport trunk native vlan 55
switchport trunk allowed vlan 1,10,20,30,55,77
switchport mode trunk
!
interface FastEthernet0/2
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/3
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/4
switchport access vlan 30
switchport mode access
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
switchport access vlan 20
switchport mode access
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
no ip route-cache
shutdown
!
interface Vlan77
ip address 192.168.77.2 255.255.255.0
no ip route-cache
!
ip default-gateway 192.168.77.1
ip http server
ip http secure-server
!
control-plane
!
!
line con 0
line vty 0 4
login
line vty 5 15
login
!
end
Switch#show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/5, Fa0/6, Fa0/7, Fa0/8
Fa0/9, Fa0/10, Fa0/11, Fa0/12
Fa0/13, Fa0/14, Fa0/15, Fa0/16
Fa0/17, Fa0/18, Fa0/19, Fa0/21
Fa0/22, Fa0/23, Fa0/24, Gi0/1
Gi0/2
10 students active Fa0/2
20 faculty active Fa0/3, Fa0/20
30 administration active Fa0/4
55 native active
77 management active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
10 enet 100010 1500 - - - - - 0 0
20 enet 100020 1500 - - - - - 0 0
30 enet 100030 1500 - - - - - 0 0
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
55 enet 100055 1500 - - - - - 0 0
77 enet 100077 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0
Remote SPAN VLANs
------------------------------------------------------------------------------
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
Switch#show interface trunk
Port Mode Encapsulation Status Native vlan
Fa0/1 on 802.1q trunking 55
Port Vlans allowed on trunk
Fa0/1 1,10,20,30,55,77
Port Vlans allowed and active in management domain
Fa0/1 1,10,20,30,55,77
Port Vlans in spanning tree forwarding state and not pruned
Fa0/1 1,10,20,30,55,77
Solved! Go to Solution.
04-22-2020 02:35 PM - edited 04-22-2020 02:38 PM
Hi,
I don't know why there is mention of /32 subnets when all I have entered at any point has been 255.255.255.0 masks.
The /32 you see on the routing table is just a host address you have configured for each sub-interface. So, that is not an issue.
The config overall looks good.
interface FastEthernet0/0
ip address 192.168.1.3 255.255.255.0
duplex auto
speed auto
Can you delete the IP address from the main interface (fa0/0) and than test?
Also, if this does not help, do you see the mac address for each laptop on the switch for port fa0/2 and 3?
If, yes, can you ping the router from the switch?
If no, can you ping the switch from the router? ?
Are ports fa0/2 and 3 in up and up mode. sh ip int bri int fa0/2
Also, can you configure the same native vlan you have on the switch on the router as well (55)?
HTH
04-22-2020 02:35 PM - edited 04-22-2020 02:38 PM
Hi,
I don't know why there is mention of /32 subnets when all I have entered at any point has been 255.255.255.0 masks.
The /32 you see on the routing table is just a host address you have configured for each sub-interface. So, that is not an issue.
The config overall looks good.
interface FastEthernet0/0
ip address 192.168.1.3 255.255.255.0
duplex auto
speed auto
Can you delete the IP address from the main interface (fa0/0) and than test?
Also, if this does not help, do you see the mac address for each laptop on the switch for port fa0/2 and 3?
If, yes, can you ping the router from the switch?
If no, can you ping the switch from the router? ?
Are ports fa0/2 and 3 in up and up mode. sh ip int bri int fa0/2
Also, can you configure the same native vlan you have on the switch on the router as well (55)?
HTH
04-22-2020 08:43 PM
Thank you! I think I forgot to do a no shutdown on a few of the switch interfaces. For some reason, I still can't ping to everything but when I recreated the ROAS in Packet Tracer, it worked perfectly and I could ping evertyhing from any VLAN. I might try to start over with the physical equipment but I think I should be good now. Thank you!
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