Let's talk Layer 2 (or not)

[cre8toruk]

Hi All,

ok so my 350XG is all configured up and I need now to connect it to my existing (to be replaced) infrastructure.

So I configured the following;

interface TenGigabitEthernet1/0/7
 description DELL-STACK-TEMP
 switchport mode trunk
 switchport trunk allowed vlan 200

I then configured a port on the XG as an access port on vlan 200 as below;

interface TenGigabitEthernet1/0/8
 description Test
 switchport access vlan 200

I then connected port 7 to my Dell 6224 (port 21) which I configured as a trunk port also

interface ethernet 1/g20
description "TEMP-CiscoXG"
mtu 9216
switchport mode general
switchport general pvid 200
switchport general allowed vlan add 200 tagged
exit

I've also tried configuring it,

interface ethernet 1/g20
description "TEMP-CiscoXG"
mtu 9216
switchport mode trunk
exit

I've hooked a laptop up to port 8 on the cisco (the access port) and given it an IP address of 192.168.200.210 /24. The gateway on the Dell for VLAN 200 is 192.168.200.254... I'm not able to ping anything from the laptop (including the gateway) and I can't ping the laptop from anything connected to the Dell switch....

Anyone any ideas what I'm doing wrong? I'm sure it's something daft!

thanks in advance,

Paul.

[balaji.bandi]

Do you see the port comes up and connected?

cisco MTU normally 1500 ( remove from Dell switch).

[cre8toruk]

Update:

Ok so I've assigned an IP of 192.168.200.253 to the Cisco XG VLAN 200 interface and I can now ping that from the Dell.

I still can't ping the laptop though.... (and I can't ping it from the Cisco either, which is, I think odd)...

[Reza Sharifi]

Make sure the laptop does not have any firewall software that blocks ICMP (ping).

HTH

[cre8toruk]

ok getting somewhere now... I can ping the laptop from both switches (dell & cisco) which is ok... and the Laptop is able to go get a dhcp allocated ip address...

I can't ping it from a server on a different vlan though, which I would have thought I would be able to...

[Reza Sharifi]

I can't ping it from a server on a different vlan though, which I would have thought I would be able to...

What vlan is that? I only see one vlan (200) in your trunk configuration.

Also, if you have multiple vlans on the switch, you may need to enable routing on it, so you can route between vlans. On a Cisco switch the command is "ip routing" but not sure about Dell.

HTH

[cre8toruk]

So we have VLAN 10 for servers.. server 192.168.10.10 is connected to the dell switch which has VLAN all setup (it's the existing config)... and the default gateway is setup on the Dell switch (192.168.10.254) the Cisco has VLAN 10 set up and int VLAN 10 setup but with no ip address. 

So to be clear... we have a 6224 Dell switch currently supporting VLAN 10 (for servers) and VLAN 200 for endpoints... I've connected a Cisco 350XG and configured a trunk port and restricted it to just VLAN 200 traffic. If I'm right in my thinking... packets destined for an endpoint on 192.168.200.xxx it should vlan route it via the trunk because the Dell switch has INT VLAN 200 set with a 192.168.200.254 gateway address... (is that right?)....

So my endpoint (with the help of the DHCP relay i'm guessing) is getting a DHCP ip address from the server on 192.168.10.10 but curiously the server on 192.168.10.10 isn't able to ping the endpoint (192.168.200.207) which is located on the Cisco switch on an access port in the 200 VLAN.

I guess what should work is that an endpoint on the dell switch in VLAN 200 should be able to ping the endpoint on the Cisco in VLAN 200 since that's layer 2 trunking.

The object of this exercise is to get the Cisco and the Dell connected so I can build two new virtual servers (in the 10 vlan) but I wanted to prove the connection with the 200 VLAN first... it was all so easy in packet tracer.

[Jon Marshall]

What is the laptop's default gateway and which switch has the interface with that IP ? 

Same question for server. 

Can the laptop ping it's default gateway (whatever that is) and 192.168.10.254 ?

Jon

[cre8toruk]

Laptop def gateway: 192.168.200.254 - hosted on Dell Switch (Laptop connected to Cisco switch)
Server def gateway: 192.169.10.254 - hosted on Dell Switch (Server connected to Dell switch)
Laptop can ping 192.168.200.254 but not 192.168.10.254... do i need to trunk that?

[Jon Marshall]

You don't need to trunk it, you need the Dell switch to route between those vlans. 

It sounds at the moment as if you have not set up routing on the Dell switch. 

Jon

[Jaderson Pessoa]

Is possible to drew your topology? Can be simple, just to we know and understood better your request/issue.

[cre8toruk]

will do in a bit.

[cre8toruk]

does this help?

[Jaderson Pessoa]

Are you able to ping the gateway from switch itself?
Does your port connected to PC what speed? Because interface is TENgigabit and your PC is TENgigabit? or this were negociate in a Gigabit?

[cre8toruk]

I couldn't ping the gw from the switch since (the cisco that is) didn't have an IP address assigned to any vlan… we're talking layer 2 here not 3... If I add 192.168.200.253 to the vlan 200 interface I can ping the default gateway (192.168.200.254) on the Dell switch and all other subnets i.e. 192.168.10.254 (the default gateway for the server VLAN (10)) and the server on 192.168.10.10.... I'll run some more diagnostics and determine what is working and what isn't and then summarise it.... I'm hoping this is only a temporary hookup while I'm migrating the company's VM infrastructure to new servers (and new switches)..