Routing

I have 2 EX4200 connected and have 7 VLANs setup. Each device that is connected to the switch, even if on a different VLAN, can ping each other. So I can ping 10.110.200.10 (VLAN200) from 10.110.254.10 (VLAN254). I have a Cisco 1720 connected to he switch. It is plugged into one of the VLAN254 ports. The Ethernet IP of the router matches the subnet of the VLAN254, ie, 10.110.254.0/24. From the other side of the Cisco router, I can ping any device on the VLAN254 network, but not any others. Could this be because the port where the router is pluged into is only tagged for the one VLAN? Should it be a trunk and set to all VLAN members?

Current interface config:

    ge-0/0/47 {
        description "Router Uplink";
        unit 0 {
            family ethernet-switching {
                port-mode access;
                vlan {
                    members VLAN254;
                }
            }
        }
    }

Do you have the appropriate routes from the Cisco router and also does the EX 4200 have routes to the "other" networks via the 1720?

On the 4200, the static route next-hop is to the Cisco's Ethernet IP address.

On the 1720, the static route next-hop is to another Cisco's Serial1 ip address. The second Cisco 1720 is in the corp office.

Yes. Configure the uplink to the router as a trunk port and you can then specfy vlan members all or simply specify the individual vlans you want it tocarry traffic for.

This config will give you all the vlans configured on the switch on the "Trunk" interface

    ge-0/0/47 {
        description "Router Uplink";
        unit 0 {
            family ethernet-switching {
                port-mode trunk;
                vlan {
                    members all;
                }
            }
        }
    }

If you only want lets say 3 vlans on the "Trunk" interface you name them seperatly

Current interface config:

    ge-0/0/47 {
        description "Router Uplink";
        unit 0 {
            family ethernet-switching {
                port-mode trunk;
                vlan {
                    members [ VLAN254 VLAN255 VLAN256 ] ;
                }
            }
        }
    }

Thanks guys, I'll change it and report back.

so i set the port mode to trunk and added the second vlan. After the commit, i lost communication between the two locations. I couldn't even ping the ethernet port's IP address. I put it back to port mode access and the one vlan communication was restored.

Hi 

---

@forced wrote:

so i set the port mode to trunk and added the second vlan. After the commit, i lost communication between the two locations. I couldn't even ping the ethernet port's IP address. I put it back to port mode access and the one vlan communication was restored.

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You should have set Your CSCO 17200 port also to:

!

interface GigX/Y.254

encapsulation dot1q 254

ip address <VLAN 254 IP> <whatever mask>

!

interface GigX/Y.<second vlan>

encapsulation dot1q <second VLAN id>

ip address <second VLAN IP> <whatever mask>

!

HTH

Thanks

Alex

The 1720 does not support 802.1Q VLANs

Too bad.

Then Your options are:

1/ use 1 physical port per VLAN on 1720

2 get rid of 1 VLAN=1 subnet model and use 1 VLAN=multiple subnets model. Then You'll be able to use untagged port on 1720 with "secondary" IP addresses.

3/ buy 1721 or any other router which supports 802.1Q VLAN tagging.

HTH

Thanks

Alex

Well, there is only one ethernet port on the 1720 and I don't want to do multiple subnets on a single VLAN, so it looks like I'll be getting some new routers in the near future!

Thanks.