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I am trying to link up a few PCs through PT, with a mix of VLAN and physical connections. I have managed to ping 2 different PCs, but i cannot ping the switch, the router or any of the sub routes.

Here is the IP address details

192.168.50.15 255.255.255.0 192.168.10.1

Here is the setup for the ports on Switch B

Using 2764 bytes ! version 12.1 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Switch ! ! spanning-tree mode pvst spanning-tree extend system-id ! interface FastEthernet0/1 switchport access vlan 50 switchport trunk allowed vlan 1-99 switchport mode trunk ! interface FastEthernet0/2 switchport access vlan 50 switchport mode access

(This is the same up to Fa0/12)

interface FastEthernet0/13 switchport access vlan 80 switchport mode access

(this is the same for all the ports until 24)

interface GigabitEthernet0/1 switchport trunk allowed vlan 1-99 switchport mode trunk ! interface GigabitEthernet0/2 switchport access vlan 32 switchport trunk allowed vlan 1-99 switchport mode trunk ! interface Vlan1 ip address 192.168.70.1 255.255.255.0 ! interface Vlan50 mac-address 0002.4a18.6202 ip address 192.168.50.1 255.255.255.0 ! interface Vlan99 mac-address 0002.4a18.6203 ip address 192.168.99.2 255.255.255.0 ! ip default-gateway 192.168.10.1 ! ! line con 0 ! line vty 0 4 login line vty 5 15 login ! ! end

Here is the setup for the ports on Switch A

Building configuration... Current configuration : 2762 bytes ! version 12.1 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Switch ! ! ! ! ! spanning-tree mode pvst spanning-tree extend system-id ! interface FastEthernet0/1 switchport access vlan 50 switchport trunk allowed vlan 1-99 switchport mode trunk ! interface FastEthernet0/2 switchport access vlan 50 switchport mode access

(This is the same up to fa0/12)

interface FastEthernet0/13 switchport access vlan 80 switchport mode access

(This is the same for all the ports until 24)

interface GigabitEthernet0/1 switchport trunk allowed vlan 1-99 switchport mode trunk ! interface GigabitEthernet0/2 switchport access vlan 32 switchport trunk allowed vlan 1-99 switchport mode trunk ! interface Vlan1 ip address 192.168.1.1 255.255.255.0 ! ! interface Vlan50 mac-address 0001.64db.c002 ip address 192.168.50.1 255.255.255.0 ! interface Vlan99 mac-address 0001.64db.c003 ip address 192.168.99.1 255.255.255.0 ! ip default-gateway 192.168.10.1 ! ! line con 0 ! line vty 0 4 login line vty 5 15 login ! ! ! ! end

Here is the details for the router

Current configuration : 1289 bytes ! version 15.1 no service timestamps log datetime msec no service timestamps debug datetime msec no service password-encryption ! hostname Router ! ! ! ! ! ip dhcp pool SERVICEPOOL network 192.168.50.0 255.255.255.0 default-router 192.168.10.1 ip dhcp pool STUDENTPOOL dns-server 8.8.8.8 domain-name STUDENTPOOL ip dhcp pool ADMINPOOL network 192.168.80.0 255.255.255.0 default-router 192.168.10.1 dns-server 8.8.8.8 ! ! no ip cef no ipv6 cef ! ! ! ! license udi pid CISCO2901/K9 sn FTX1524S0XS ! ! ! ! ! spanning-tree mode pvst ! ! ! interface GigabitEthernet0/0 no ip address duplex auto speed auto shutdown ! interface GigabitEthernet0/1 ip address 192.168.10.1 255.255.255.0 duplex auto speed auto ! interface GigabitEthernet0/1.5 no ip address ! interface GigabitEthernet0/1.50 encapsulation dot1Q 50 ip address 192.168.50.1 255.255.255.0 ! interface GigabitEthernet0/1.80 encapsulation dot1Q 80 ip address 192.168.89.254 255.255.255.0 ! interface Serial0/0/0 no ip address clock rate 2000000 shutdown ! interface Serial0/0/1 no ip address clock rate 2000000 shutdown ! interface Vlan1 no ip address shutdown ! ip classless ! ip flow-export version 9 ! ! ! no cdp run ! ! ! ! ! line con 0 ! line aux 0 ! line vty 0 4 login ! end

Here is the network diagram

Network Diagram

I did manage to find a solution to part of the original question, but im stumped with the rest of it.

Thanks in advance

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  • You have not provided enough information to even begin to help. Please edit your question to include a network diagram, the network device models, and the network device configurations. If it is a layer-2 switch, then you cannot put IP addresses on the switch interfaces. Commented Aug 23, 2019 at 12:59
  • Please include the diagram and full network device configurations. Commented Aug 23, 2019 at 13:19
  • Network diagram and all connections are now included Commented Aug 24, 2019 at 0:13
  • Please include the full network device configurations. You are missing some configurations that we need to see. Commented Aug 24, 2019 at 0:13
  • Is that showing the running configuration? Commented Aug 24, 2019 at 0:34

2 Answers 2

Reset to default
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If PC config is like I think it is so: 192.168.50.15 <- pc ip address 255.255.255.0 <- mask 192.168.10.1 <- default gateway

Then ofc its wrong because your gateway is in different subnet. Default gateway should be in the same subnet as computer so in this case gateway could be on 192.168.50.1. Now you should be able ping router about switch:

if your switch is Layer 2 device (not L3) and managment vlan have different addressing than your pc then switch should have ip default-gateway set, also L2 switch ip address you setting on vlan interface because you can't set ip address on normal physical interface on L2 switch.

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You have some serious configuration problems.

It looks like you have some addressing problems.

Switch:

interface Vlan1 ip address 192.168.1.1 255.255.255.0 <- ##### Does not match network of router interface GigabitEthernet0/1 ##### ! interface Vlan50 mac-address 0001.64db.c002 ip address 192.168.50.1 255.255.255.0 <- ##### Duplicate of router interface GigabitEthernet0/1.50 ##### ! interface Vlan99 mac-address 0001.64db.c003 ip address 192.168.99.1 255.255.255.0 <- ##### Does not exist on router, so isolated and cannot reach any other network ##### ! ip default-gateway 192.168.10.1 <- ##### the switch does not know how to reach this network ##### !

Router:

interface GigabitEthernet0/1 ip address 192.168.10.1 255.255.255.0 duplex auto speed auto ! interface GigabitEthernet0/1.5 <- ##### Useless and should be removed ##### no ip address ! interface GigabitEthernet0/1.50 encapsulation dot1Q 50 ip address 192.168.50.1 255.255.255.0 <- ##### Duplicate of switch interface Vlan50 ##### ! interface GigabitEthernet0/1.80 encapsulation dot1Q 80 ip address 192.168.89.254 255.255.255.0<- ##### Does not match the DHCP pool network ##### !

If you are using layer-2 switches, you only need a single SVI (for switch management). Remove all the SVIs except for VLAN 1. Probably something like:

SwitchA:

interface Vlan1 ip address 192.168.10.2 255.255.255.0 !

SwitchB:

interface Vlan1 ip address 192.168.10.3 255.255.255.0 !

You also want to create the VLANs on the switches with the global vlan command, and you can optionally name them. You do not need to do this with VLAN 1, just any other VLANs you want to use. Based on what the router has defined, it will look something like this:

vlan 50 name <VLAN name> ! This line is optional, and VLAN names cannot contain spaces exit ! vlan80 name <VLAN name, no spaces> ! This line is optional, and VLAN names cannot contain spaces exit !

Also, your DHCP pools have some problems:

ip dhcp pool SERVICEPOOL network 192.168.50.0 255.255.255.0 default-router 192.168.10.1 <- ##### The default gateway for a network must be an address on the network, in this case the router VLAN 50 address of 192.168.50.1 ##### ip dhcp pool STUDENTPOOL dns-server 8.8.8.8 domain-name STUDENTPOOL ip dhcp pool ADMINPOOL network 192.168.80.0 255.255.255.0 <- ##### Does not match the router network for VLAN 80 of 192.168.89.0 ##### default-router 192.168.10.1 <- ##### The default gateway for a network must be an address on the network, in this case the router VLAN 80 address of 192.168.89.254 ##### dns-server 8.8.8.8 !
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  • Just asking some followup questions for clarification, if I wanted the SVI to be VLAN 99 and ping-able from a PC on VLAN 50, is there anything I have to do differently for this? Also is there something additional I need to do to ping from a PC to a sub-interface on the router? Thanks Commented Aug 25, 2019 at 5:34
  • If you do what I have outlined, the PCs will get proper addressing and gateways, and they should be able to ping the router interfaces. If you want VLAN 99, then you need to create it on the router, too. The only SVIs you need are for the management of the switch. Do not over complicate the switch configuration. Commented Aug 25, 2019 at 5:36

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