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lestin0noel
PostPosted: Thu Apr 12, 2012 1:46 am 
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Newb guy here,

Just messing around with packet tracer for a little practice. I tried to setup a router on a stick config with 3 switches trunked and PCs on different vlans. Anybody know of any issues that may arise with STP and inter-vlan routing? I set everything up correctly with trunking, addressing, encapsulations, vlans, but did not touch STP. Unable to ping from any PC to any where. Been racking my brain on this, but any input is appreciated.

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Steven King
PostPosted: Thu Apr 12, 2012 2:10 am 
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Post router config? I dont think STP would cause a problem here.

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cisco_1
PostPosted: Thu Apr 12, 2012 4:11 am 
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Hi,
is your problem is inter-vlan routing or router on a stick??
please describe your problem.


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paadams
PostPosted: Thu Apr 12, 2012 7:25 am 
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Post the configs. Just don't forget to use the code tags.
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Steven King
PostPosted: Fri Apr 13, 2012 12:23 am 
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Still waiting on the config, but did you configure sub-interfaces on the router?

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lestin0noel
PostPosted: Fri Apr 13, 2012 1:30 am 
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This is what I got.

Router config
Code:
interface FastEthernet0/1
 no ip address
 duplex auto
 speed auto
!
interface FastEthernet0/1.10
 encapsulation dot1Q 10
 ip address 192.168.10.1 255.255.255.0
!
interface FastEthernet0/1.20
 encapsulation dot1Q 20
 ip address 192.168.20.1 255.255.255.0
!
interface FastEthernet0/1.30
 encapsulation dot1Q 30
 ip address 192.168.30.1 255.255.255.0
!
interface Serial0/0/0
 ip address 172.16.0.10 255.255.255.252
 clock rate 64000
!
interface Serial0/0/1
 ip address 172.16.0.1 255.255.255.252
!
interface Vlan1
 no ip address
 shutdown

Interface              IP-Address      OK? Method Status                Protocol
 
FastEthernet0/0        unassigned      YES unset  up                    up
 
FastEthernet0/1        unassigned      YES unset  up                    down
 
FastEthernet0/1.10     192.168.10.1    YES manual up                    down
 
FastEthernet0/1.20     192.168.20.1    YES manual up                    down
 
FastEthernet0/1.30     192.168.30.1    YES manual up                    down
 
Serial0/0/0            172.16.0.10     YES manual up                    up
 
Serial0/0/1            172.16.0.1      YES manual up                    up
 
Vlan1                  unassigned      YES unset  administratively down down

Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 2 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistributing: rip
Default version control: send version 2, receive 2
  Interface             Send  Recv  Triggered RIP  Key-chain
  Serial0/0/0           2     2     
  Serial0/0/1           2     2     
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
   172.16.0.0
   192.168.10.0
   192.168.20.0
   192.168.30.0
Passive Interface(s):
Routing Information Sources:
   Gateway         Distance      Last Update
   172.16.0.9           120      00:00:14
   172.16.0.2           120      00:00:11
Distance: (default is 120)
R1(config)#exit
R1#
%SYS-5-CONFIG_I: Configured from console by console
sh ip route
Codes: C - connected, S - static, I - IGRP, 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, E - EGP
       i - IS-IS, 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

Gateway of last resort is not set

     172.16.0.0/30 is subnetted, 3 subnets
C       172.16.0.0 is directly connected, Serial0/0/1
R       172.16.0.4 [120/1] via 172.16.0.9, 00:00:22, Serial0/0/0
                   [120/1] via 172.16.0.2, 00:00:19, Serial0/0/1
C       172.16.0.8 is directly connected, Serial0/0/0
R    209.10.30.0/24 [120/1] via 172.16.0.9, 00:00:22, Serial0/0/0


Switch 1
Code:
VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    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, Fa0/20, Fa0/21
                                                Fa0/22, Fa0/23, Fa0/24
10   10                               active   
20   20                               active   
30   30                               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

SW1#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/1       on           802.1q         trunking      99
Fa0/2       on           802.1q         trunking      99
Fa0/3       on           802.1q         trunking      99
Fa0/4       on           802.1q         trunking      99
Fa0/5       on           802.1q         trunking      99

Port        Vlans allowed on trunk
Fa0/1       1-1005
Fa0/2       1-1005
Fa0/3       1-1005
Fa0/4       1-1005
Fa0/5       1-1005

Port        Vlans allowed and active in management domain
Fa0/1       1,10,20,30
Fa0/2       1,10,20,30
Fa0/3       1,10,20,30
Fa0/4       1,10,20,30
Fa0/5       1,10,20,30

Port        Vlans in spanning tree forwarding state and not pruned
Fa0/1       1,10,20,30
Fa0/2       1,10,20,30
Fa0/3       1,10,20,30
Fa0/4       1,10,20,30
Fa0/5       1,10,20,30


Switch 2
Code:
VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    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, Fa0/20, Fa0/21, Fa0/22
                                                Fa0/23, Fa0/24
10   10                               active    Fa0/5
20   20                               active    Fa0/6
30   30                               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
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
------- --------- ----------------- ------------------------------------------
SW2(config)#do sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/1       on           802.1q         trunking      99
Fa0/2       on           802.1q         trunking      99
Fa0/3       on           802.1q         trunking      99
Fa0/4       on           802.1q         trunking      99

Port        Vlans allowed on trunk
Fa0/1       1-1005
Fa0/2       1-1005
Fa0/3       1-1005
Fa0/4       1-1005

Port        Vlans allowed and active in management domain
Fa0/1       1,10,20,30
Fa0/2       1,10,20,30
Fa0/3       1,10,20,30
Fa0/4       1,10,20,30

Port        Vlans in spanning tree forwarding state and not pruned
Fa0/1       1,10,20,30
Fa0/2       none
Fa0/3       1,10,20,30
Fa0/4       1,10,20,30


Switch 3
Code:
VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    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, Fa0/20, Fa0/21, Fa0/22
                                                Fa0/23, Fa0/24
10   10                               active    Fa0/5
20   20                               active   
30   30                               active    Fa0/6
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
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
------- --------- ----------------- ------------------------------------------
SW3#sh int trunk
Port        Mode         Encapsulation  Status        Native vlan
Fa0/1       on           802.1q         trunking      99
Fa0/2       on           802.1q         trunking      99
Fa0/3       on           802.1q         trunking      99
Fa0/4       on           802.1q         trunking      99

Port        Vlans allowed on trunk
Fa0/1       1-1005
Fa0/2       1-1005
Fa0/3       1-1005
Fa0/4       1-1005

Port        Vlans allowed and active in management domain
Fa0/1       1,10,20,30
Fa0/2       1,10,20,30
Fa0/3       1,10,20,30
Fa0/4       1,10,20,30

Port        Vlans in spanning tree forwarding state and not pruned
Fa0/1       none
Fa0/2       none
Fa0/3       1,10,20,30
Fa0/4       none
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lestin0noel
PostPosted: Fri Apr 13, 2012 1:30 am 
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and yea router on a stick. configured sub-ints
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Steven King
PostPosted: Fri Apr 13, 2012 1:40 am 
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Here's your problem. Explains why there's nothing, not even connected routes in the routing table for the subnets, I think?

Code:
Interface              IP-Address      OK? Method Status                Protocol
 
FastEthernet0/0        unassigned      YES unset  up                    up
 
FastEthernet0/1        unassigned      YES unset  up                   --> down <--
 
FastEthernet0/1.10     192.168.10.1    YES manual up                   --> down <--
 
FastEthernet0/1.20     192.168.20.1    YES manual up                    --> down <--
 
FastEthernet0/1.30     192.168.30.1    YES manual up                   --> down <--
 
Serial0/0/0            172.16.0.10     YES manual up                    up
 
Serial0/0/1            172.16.0.1      YES manual up                    up
 
Vlan1                  unassigned      YES unset  administratively down down


Find out why and let us know. I think I know what the problem is, and it's bit me before but on a different topic. I'll keep it to myself for now, but let me know when you're tired of looking and I'll tell you what I think it is.

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paadams
PostPosted: Fri Apr 13, 2012 7:21 am 
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Attach the packet tracer file.
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rolon
PostPosted: Fri Apr 13, 2012 7:45 am 
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Did you setup the switch port the router connects to as a "switchport trunk" with encapsulation?
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Steven King
PostPosted: Fri Apr 13, 2012 12:48 pm 
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rolon wrote:
Did you setup the switch port the router connects to as a "switchport trunk" with encapsulation?


There's 5 connections shown in the diagram on SW1. The output from SW1 shows 5 interfaces, Fa0/1 through Fa0/5, in trunking mode with 802.1q encapsulation, so I think he's good there. I'm pretty sure the problem is at the router.

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Badshah
PostPosted: Fri Apr 13, 2012 2:12 pm 
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Your Router Int showing protocol down itself....How it will do inter Vlan routing..

FastEthernet0/1 unassigned YES unset up down

. Check whether Speed setting at both switch and router is same.
. Check on Switch whether trunking is set to dot1q.

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Steven King
PostPosted: Fri Apr 13, 2012 6:04 pm 
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Well I know the protocol being down is not a good thing, but I thought the problem was not setting the encapsulation on Fa0/1. After a some quick research though, I think I'm wrong.

Do you have SVIs configured for the VLANs on SW1? Refer: http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/336-cisco-router-8021q-router-stick.html

I wish my lab wasn't so jenky and hard to get to... I could easily reproduce this.

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lestin0noel
PostPosted: Sat Apr 14, 2012 1:58 am 
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yea i noticed protocol line down when i posted these configs, but im still trying to figure out why. and yea ive configured switchport connecting to router as trunked dot1q.
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lestin0noel
PostPosted: Sat Apr 14, 2012 2:03 am 
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i figured it out. configured fa0/1 with sub ints instead of fa0/0 which is what the switchport is connected to. feel like a tard now overlooking something so simple lol. able to ping all pcs now. thanks for the input guys
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Steven King
PostPosted: Sat Apr 14, 2012 1:55 pm 
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Haha... I shoulda picked up on, ''Why is Fa0/0 listed as up/up if you only have one Fa interface connected according to the diagram."

That'll do it.

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Badshah
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Steven King wrote:
Well I know the protocol being down is not a good thing, but I thought the problem was not setting the encapsulation on Fa0/1. After a some quick research though, I think I'm wrong.

Do you have SVIs configured for the VLANs on SW1? Refer: http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/336-cisco-router-8021q-router-stick.html

I wish my lab wasn't so jenky and hard to get to... I could easily reproduce this.



When you have have Router on stick ..u dont need SVI.....as both do the same function Inter vlan routing...
For encapsulation L2 status doesn't goes down..I have suggested for aftermath.. :)

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Carlitos_30
PostPosted: Sat Apr 14, 2012 2:28 pm 
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You can configure PT to always show interfaces labels.
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Steven King
PostPosted: Sat Apr 14, 2012 7:35 pm 
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Yeah.. I was iffy on the SVI thing but that's what the site I found with quick research said... I can't remember but... I don't think you can configure more than one SVI on a L2 switch?

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Carlitos_30
PostPosted: Tue Apr 17, 2012 5:51 pm 
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Quote:
I don't think you can configure more than one SVI on a L2 switch?


It depends. In 2950 with the base image you can but only one will go active, the rest will shutdown. In 2960's you can configure more than one active SVI. In 2950's with enhaced image I don't know.
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