Question about interVLAN routing.

markzab

mikej412 wrote:

Didn't you say you had posted on some other forums too?

Did we win! Did we win! Did any other forum figure out it was a Boson problem?

That hasnt been proven yet actually.

mikej412

markzab wrote:

That hasnt been proven yet actually.

I don't know.... a search of the CCNA forum for boson and vlan returns a lot of posts with "problem" in the subject.

There might even be a post or two in there where I tried the configs on real hardware....

That's why I asked if it was Boson.... ( but an IOS bug might have been the next question after Boson).

georgemc

Aaargh...

Well, now that we know it Boson NetSim, we may get somewhere...

I put the exact some configs(???) into "Boson NetSim for CCNP v 6.06" and it worked as advertised.

Router Config (2620) w/ 1 FA and 1 ser

Router#wr t
!
Version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Router
!
!
!
ip subnet-zero
!
!
!
!
!
!
!
!
interface Serial0
no ip address
no ip directed-broadcast
shutdown
!
interface FastEthernet0/0
no ip address
no ip directed-broadcast
bandwidth 100000
!
interface FastEthernet0/0.2
encapsulation dot1q 10
ip address 10.10.10.1 255.255.255.0
!
interface FastEthernet0/0.3
encapsulation dot1q 11
ip address 11.11.11.1 255.255.255.0
!
!
ip classless
no ip http server
!
!
!
!
line con 0
transport input none
line aux 0
line vty 0 4
!
no scheduler allocate
end

Switch Config (2950 12 port)

Switch#sh run
!
Version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Switch
!
!
!
ip subnet-zero
spanning-tree extend system-id
!
!
!
!
!
!
!
!
interface FastEthernet0/1
switchport mode access
switchport access vlan 10
!
interface FastEthernet0/2
switchport mode access
switchport access vlan 10
!
interface FastEthernet0/3
switchport mode access
switchport access vlan 11
!
interface FastEthernet0/4
switchport mode access
switchport access vlan 11
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
switchport mode trunk
switchport trunk encapsulation dot1q
!
vtp domain bigdomain
!
interface Vlan 1
no ip address
no ip route-cache
!
vlan 10 name VLAN0010
vlan 11 name VLAN0011
!
ip classless
no ip http server
!
!
!
!
line con 0
transport input none
line aux 0
line vty 0 15
!
no scheduler allocate
end

Config and PING RESULTS for PC1 (Win9 config is same as yours above for other PCs:

C:> ipconfig

HELP
Manipulates ip address for Workstation.

IPCONFIG [/ip] [/dg]
/ip Adds the ip address and subnet mask to the workstation
/dg Adds the default gateway to the workstation

Examples:
¢ ipconfig /ip 157.1.1.12 255.0.0.0
¢ ipconfig /dg 157.1.1.1

Boson BOSS 5.0 IP Configuration
Ethernet adapter Local Area Connection:
IP Address. . . . . . . . . . . . : 10.10.10.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.10.10.1


You can also use winipcfg to configure the IP Address

C:>ping 10.10.10.2
Pinging 10.10.10.2 with 32 bytes of data:

Reply from 10.10.10.2: bytes=32 time=60ms TTL=241
Reply from 10.10.10.2: bytes=32 time=60ms TTL=241
Reply from 10.10.10.2: bytes=32 time=60ms TTL=241
Reply from 10.10.10.2: bytes=32 time=60ms TTL=241
Reply from 10.10.10.2: bytes=32 time=60ms TTL=241

Ping statistics for 10.10.10.2: Packets: Sent = 5, Received = 5, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 50ms, Maximum = 60ms, Average = 55ms

C:>ping 10.10.10.3
Pinging 10.10.10.3 with 32 bytes of data:

Reply from 10.10.10.3: bytes=32 time=60ms TTL=241
Reply from 10.10.10.3: bytes=32 time=60ms TTL=241
Reply from 10.10.10.3: bytes=32 time=60ms TTL=241
Reply from 10.10.10.3: bytes=32 time=60ms TTL=241
Reply from 10.10.10.3: bytes=32 time=60ms TTL=241

Ping statistics for 10.10.10.3: Packets: Sent = 5, Received = 5, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 50ms, Maximum = 60ms, Average = 55ms

C:>ping 10.10.10.1
Pinging 10.10.10.1 with 32 bytes of data:

Reply from 10.10.10.1: bytes=32 time=60ms TTL=241
Reply from 10.10.10.1: bytes=32 time=60ms TTL=241
Reply from 10.10.10.1: bytes=32 time=60ms TTL=241
Reply from 10.10.10.1: bytes=32 time=60ms TTL=241
Reply from 10.10.10.1: bytes=32 time=60ms TTL=241

Ping statistics for 10.10.10.1: Packets: Sent = 5, Received = 5, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 50ms, Maximum = 60ms, Average = 55ms

C:>ping 11.11.11.1
Pinging 11.11.11.1 with 32 bytes of data:

Reply from 11.11.11.1: bytes=32 time=60ms TTL=241
Reply from 11.11.11.1: bytes=32 time=60ms TTL=241
Reply from 11.11.11.1: bytes=32 time=60ms TTL=241
Reply from 11.11.11.1: bytes=32 time=60ms TTL=241
Reply from 11.11.11.1: bytes=32 time=60ms TTL=241

Ping statistics for 11.11.11.1: Packets: Sent = 5, Received = 5, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 50ms, Maximum = 60ms, Average = 55ms

C:>ping 11.11.11.2
Pinging 11.11.11.2 with 32 bytes of data:

Reply from 11.11.11.2: bytes=32 time=60ms TTL=241
Reply from 11.11.11.2: bytes=32 time=60ms TTL=241
Reply from 11.11.11.2: bytes=32 time=60ms TTL=241
Reply from 11.11.11.2: bytes=32 time=60ms TTL=241
Reply from 11.11.11.2: bytes=32 time=60ms TTL=241

Ping statistics for 11.11.11.2: Packets: Sent = 5, Received = 5, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 50ms, Maximum = 60ms, Average = 55ms

C:>ping 11.11.11.3
Pinging 11.11.11.3 with 32 bytes of data:

Reply from 11.11.11.3: bytes=32 time=60ms TTL=241
Reply from 11.11.11.3: bytes=32 time=60ms TTL=241
Reply from 11.11.11.3: bytes=32 time=60ms TTL=241
Reply from 11.11.11.3: bytes=32 time=60ms TTL=241
Reply from 11.11.11.3: bytes=32 time=60ms TTL=241

Ping statistics for 11.11.11.3: Packets: Sent = 5, Received = 5, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 50ms, Maximum = 60ms, Average = 55ms

Not sure what else to do if yours still doesn't work.

This is a fairly simple config and it's hard to believe that even Boson free sim(???) wouldn't be able to run it correctly.

Sure hope this helps.

Please...Next time be sure to mention it you're using a simulator. Can make a really big difference in the troubleshooting efforts. Remember, we're not there to actually see what you're using and if you say you have a router, a switch and some PCs, we believe you.:)

Georgemc

DirtySouth

persona wrote:

Well at least the config I did was correct. This is the most important thing to me.

Also I wanna praise this forum for having ppl like you gents.
Thank you for your concern.

/respect I have for all.

@markzab: ok will do. Will post it l8tr.

Persona

So...did it work? Did you change anything?

georgemc

Aaah...forgot to mention in my post above. I did not enable RIP because as mentioned earlier, it's not required with a single router and directly connected networks.

markzab

georgemc wrote:

Aaah...forgot to mention in my post above. I did not enable RIP because as mentioned earlier, it's not required with a single router and directly connected networks.

I was just looking through your post config for that. You cheated!

That's where I think the issue is. In his config he uses RIP so you can't use the IP classless command, right?

Can someone go and look at my last post (or next one - reposted it) and tell me if I'm right, wrong, going crazy?

EDIT: In bold.

markzab

markzab wrote:

Webmaster wrote:

markzab wrote:

Wasn't sure if I had the terminology correct. Guess not.

Wouldn't his problem be solved if he just didn't have 2 completely different networks, rather just 2 subnets in the same network? Like instead of the 11. network, just have another subnet of the 10. network?

Well, that's also a matter of terminology, in this situation, network and subnet are interchangeable (this is actually mentioned in the RIP or routing tutorial RFC). In the bigger scale, every IP network is a 'subnet'. Unless you use classful routing protocols, autosummarization and other ways of assuming the classful mask, the router doesn't care.

The routes to the networks attached to the subinterfaces will be in it (given the interfaces are actually all up, rather than just configured to be up, and the other cable isn't a cross-over, or something entirely else). It doesn't matter whether these are routes to an IP subnet or major IP network. The routes will point to the subnets (the router 'will' notice they are subnetted) and if the PCs are then configured correctly, it should work...

That said, when you set up a practice lab like this, I recommend to start with simple classful addresses. I usually use 10.0.0./8 and 11.0.0.0/8 12.. etc. because it takes less time to type than 192.168.0.1 Eventually you will want to start practicing using subnetted and variable subnetted networks, but there's no shame in wasting address space in a CCNA practice lab.

I guess my gripe would be...why not just set the first interface to 10.1.0.1 and the second to 10.2.0.1? I just think this would allow the PC's to communicate.

Also, now you kind of confused me about something. If it's a Class A network, don't the subnets start in the 2nd octet, not the first? I may have misread you wrong but did you say that 10.0 and 11.0 were on the same network, just different subnets? Because from what I'm understanding, those are 2 completely seperate networks alltogether. RIPv1 is classful so it wont know the mask is 255.255.255.0. It would assume a default mask of 255.0.0.0 for the Class A IP address. That in turn would make 10.0 and 11.0 2 completely different networks.

Will a simple protocal such as RIP allow 2 completely different networks, not subnets, to communicate?

Like, ATT has their network based off of 10.0 and Bellsouth has theirs based off of 20.0. Note, I know its much more complicated than this but...could you just connect the main routers back to back and run RIP for the 2 completely different networks to communicate?

Thats really what's been bothering me the whole time. Sorry if I'm not using proper terms in this. Still a CC-Baby.

Am I right, wrong, going insane? Could my idea be what his problem is?

markzab

Nevermind...Now I'm getting pissy.

I basically just have a question that I'll create a new thread for.

mgeorge

Wow.... Alot of post on this question and yet no body ask
what model the router is or what IOS Version in use..
(1st step to trouble shooting) lol...

Either though it's a SIM, most sim's will support the intervlan
routing simulation(s) because it's required content on the CCNA

A 10BaseT port will support dot1q trunking and intervlan
routing with IP Plus 12.2(2)T max flash/ram on a 2600's

NOTE: WIC-1ENET & NM-1E WILL NOT support trunking
only onboard ports for 2600's will check this link;
http://www.cisco.com/en/US/products/hw/routers/ps259/prod_bulletin09186a00800921e4.html

Although 10/100 Port(s) are recommended for
this feature, Please view this link for more informaiton
http://www.techexams.net/forums/viewtopic.php?t=19766

2600 Series routers that include 10/100 port(s) would
be a 2620 or higher model, and 2620XM model or higher

Also, KEEP IN MIND that IP PLUS feature set IS REQUIRED
to preform 802.1Q InterVLAN Routing due to the support of
dot1q trunking on sub interfaces.... Once agian check the link
above to find out what "IP Plus" is.

Also NO routing protocol is required for basic Router-on-a-stick
configuration, because their are no discontigious networks

Also if you are using 10/100 port and IP Plus etc... From what
I see from the config you posted, since your using dot1q, you
are not taking into account the native vlan, the switch's default
gateway must be set to the mangements subnet (which is typically
a non native vlan for security purposes)