topic Re: VLAN 1 is not working on stack mode in ICX Switches

VLAN 1 is not working on stack mode

julien_ange — Fri, 29 Jan 2021 02:44:23 GMT

Dear All,

First off please excuses me English isn't my native language.

We have two of Brocade ICX7250-48P stacked, the idea behind is to accomplish a failover , whenever switch one is down we will remain online because each server will have two ports connected to each switch.

the issue is Switch number is working fine so ive configured the second switch as stack see below

the issue as next, when I connect the cable to switch 1 doesn't matter which ports I received IP from VLAN1, when I connect it to the second switch I don't get any ip.

I don't know what I have done wrong can someone please point me to the right direction ?

this the output of VLAN1

PORT-VLAN 1, Name DEFAULT-VLAN, Priority level0, Spanning tree Off
Untagged Ports: (U1/M1) 47
Untagged Ports: (U1/M2) 2 4 5 6 7 8
Untagged Ports: (U2/M1) 47
Untagged Ports: (U2/M2) 2 4 5 6 7 8
Tagged Ports: None
Uplink Ports: None
DualMode Ports: None
Mac-Vlan Ports: None
Monitoring: Disabled

this is output of the brief interface

2/1/1 Down None None None None No 141 0 609c.9f4b.808c
2/1/2 Down None None None None Yes N/A 0 cc4e.24e3.49ab
2/1/3 Up Forward Full 1G None Yes N/A 0 cc4e.24e3.49ac
2/1/4 Down None None None None Yes N/A 0 cc4e.24e3.49ad
2/1/5 Down None None None None Yes N/A 0 cc4e.24e3.49ae
2/1/6 Down None None None None Yes N/A 0 cc4e.24e3.49af
2/1/7 Down None None None None Yes N/A 0 cc4e.24e3.49b0
2/1/8 Disable None None None None Yes N/A 0 609c.9f4b.808c
2/1/9 Down None None None None Yes N/A 0 cc4e.24e3.49b2
2/1/10 Down None None None None Yes N/A 0 cc4e.24e3.49b3
2/1/11 Up Forward Full 1G 11 Yes 141 0 609c.9f4b.808c
2/1/12 Up Forward Full 1G 11 Yes 141 0 609c.9f4b.808c
2/1/13 Down None None None None Yes N/A 0 cc4e.24e3.49b6
2/1/14 Down None None None None Yes N/A 0 cc4e.24e3.49b7
2/1/15 Down None None None None Yes N/A 0 cc4e.24e3.49b8
2/1/16 Down None None None None Yes N/A 0 cc4e.24e3.49b9
2/1/17 Down None None None None Yes N/A 0 cc4e.24e3.49ba
2/1/18 Down None None None None Yes N/A 0 cc4e.24e3.49bb
2/1/19 Down None None None None Yes N/A 0 cc4e.24e3.49bc
2/1/20 Down None None None None Yes N/A 0 cc4e.24e3.49bd
2/1/21 Down None None None None Yes N/A 0 cc4e.24e3.49be

Re: VLAN 1 is not working on stack mode

andre_paiva — Fri, 29 Jan 2021 11:36:30 GMT

Hi Julien

Show the "show configuration" and "show interface ethernet brief" of the two devices.

Tells which ports are connected to the servers and uplink ports.

Re: VLAN 1 is not working on stack mode

julien_ange — Fri, 29 Jan 2021 19:23:46 GMT

Thank you for your answer

brief interface

Configuration

Re: VLAN 1 is not working on stack mode

andre_paiva — Fri, 29 Jan 2021 19:39:18 GMT

Hi Julien,

1. You are connecting a single server that has 4 ports, two of which are connected in the each stack switch
or
2. You have two servers and each server has 2 ports connected to one port on each switch in the stack.

I'm trying to understand your Lag NAS (Ports 1/1/11 to 1/1/12 ethernet 2/1/11 to 2/1/12)

Re: VLAN 1 is not working on stack mode

andre_paiva — Fri, 29 Jan 2021 19:43:19 GMT

I also don't see the port settings 1/1/12 | 1/2/11 and 1/2/12 in config.

Re: VLAN 1 is not working on stack mode

andre_paiva — Fri, 29 Jan 2021 19:48:13 GMT

*Sorry. I also don't see the port settings 1/1/11 to 1/1/12 ethernet 2/1/11 to 2/1/12

Re: VLAN 1 is not working on stack mode

julien_ange — Fri, 29 Jan 2021 23:58:36 GMT

@andre_paiva I appreciate your support.

the NAS LACP is just a test to check the LACP configuration which seems to work.

1. You are connecting a single server that has 4 ports, two of which are connected in the each stack switch

yes this what I am exactly doing. two ports at each switch. so whenever something happens with whatever switch we will remain connected.

but when I connect a Radom pc to the second switch, none of the ports are working, the device is supposed to receive ip from the DHCP server.

is this maybe because the second switch is configured as stand by?

T=52d3h44m21.7: alone: standalone, D: dynamic cfg, S: static
ID   Type          Role    Mac Address    Pri State   Comment
1  S ICX7250-48    active  609c.9f4b.808c   0 local   Ready
2  S ICX7250-48    standby cc4e.24e3.49aa   0 remote  Ready

    active       standby
     +---+        +---+
 -2/3| 1 |2/1--2/1| 2 |2/3-
 |   +---+        +---+   |
 |                        |
 |------------------------|
Standby u2 - protocols ready, can failover or manually switch over
Current stack management MAC is 609c.9f4b.808c

Re: VLAN 1 is not working on stack mode

jijo_panangat — Mon, 01 Feb 2021 11:48:36 GMT

This could be an issue with dhcp server reachability from the pc vlans, Do u have any other PC on same vlan getting Ip from DHCP server ?

Re: VLAN 1 is not working on stack mode

jijo_panangat — Mon, 01 Feb 2021 11:49:34 GMT

You can also open a tac case for one of our tech to look into it.

Re: VLAN 1 is not working on stack mode

andre_paiva — Mon, 01 Feb 2021 17:21:46 GMT

1. When you connect a Radom PC to the second switch, how is the PVID (VLAN 141) on this port ("show interface ethernet brief")?

2. Is this problem occurring only with other PCs? Is your server connected to the ports (1/1/11 | 1/1/12 | 2/1/11 | 2/1/12) receiving IPs normally?

3. will it be because the second switch is configured as stand by?

I do not think so. As it is in the stack, a master will always be chosen and another one will stand as for the settings and control plan in mode standby.

Re: VLAN 1 is not working on stack mode

julien_ange — Mon, 01 Feb 2021 18:44:50 GMT

@jijo_panangat Thank you for your answer, when I connect PC on the primary switch they received the IP.

when I connect to the second switch the IP is not receiving with the same device.

the switch is a Layer 3 switch and I was wondering If I can configure the web gui to have a clean idea of what in happening in the switch.

the switch has layer 3 and has already extern IP, I was wondering if I can configure the gui even the switch already has extern IP.

Re: VLAN 1 is not working on stack mode

andre_paiva — Mon, 01 Feb 2021 18:51:02 GMT

Ok. But, how is the PVID (VLAN 141) on this port ("show interface ethernet brief")?

Re: VLAN 1 is not working on stack mode

eizens_putnins — Mon, 01 Feb 2021 20:09:10 GMT

Screenshot just shows that stack is managed by switch 1, and second available management module is standby. It is as it should be.

To have redundancy, you need to have all services available in case of one switch failure. It means not only that client PCs are connected to port with proper VLAN configured, but also they can reach DHCP, DNS, target services.

Also, when you connect server by 4 ports to 2 switches, it is important how are configured this ports on switch and on server, otherwise nothing will work. If server is ESXI server, for example, with multiple VLANs used, you probably want to create static LAG agregate on stack, which includes 2 ports from one switch and 2 from another switch, as well as agregate on server. Agregates must include all neccessary VLANs on both sides (all tagged, except one).

Where is located DHCP server -- on that servers? Where is connection to Internet connected? Redundancy needs planning, otherwise you may end with nothing working because of attempt to get redundancy...

Re: VLAN 1 is not working on stack mode

eizens_putnins — Mon, 01 Feb 2021 20:23:39 GMT

Looking on your posts, looks most probable, that NICs on server are not configured as agregate, so just the 1st NIC works, other are not used at all. Than your server is really connected to just 1 switch and that's it. Check server NIC configuration (LAG or NIC Teaming, depending on OS you have installed on server).

By the way, from my experience main reason of switch going down is missing power, so having 2 PSU in same switch connected to different power sources (2 UPSes) hugely improves reliability. Of course, switch can fail in many different ways, but it usually happens on reboot and not that often. Windows 10 OS fails not comparably more often, than switch, and it can't be helped, as it is so by design...

Re: VLAN 1 is not working on stack mode

julien_ange — Tue, 02 Feb 2021 21:02:15 GMT

Thank you for your answer.

are you suggesting to change the PVID in order to have the VLAN1 working on each ports? if yes why its working on the first switch and not second switch even the PVID is the same?

as I mentioned even a normal Windows 10 is not receiving ip from the DHCP neither from VLANS when I tag the interface.

Re: VLAN 1 is not working on stack mode

julien_ange — Tue, 02 Feb 2021 21:09:53 GMT

@andre_paiva I am not sure I understand your question correctly.

do you mean why I have PVID configured on the ports?

Re: VLAN 1 is not working on stack mode

andre_paiva — Tue, 02 Feb 2021 21:14:55 GMT

Hi Julien

It's a little confusing for me.
1. These are the ports "1/1/11, 1/1/12, 2/1/11, 2/1/12"?. If it is another ports, diplay "show inter eth brief"?

2. Any other vlan only works on SW1 and does not work on SW2?

Re: VLAN 1 is not working on stack mode

julien_ange — Tue, 02 Feb 2021 21:18:02 GMT

@andre_paiva apologies if I got you confused those ports are LACP for the NAS I just checked they are configured to works on VLAN1. and working fine.

on the SW2 none of the interfaces are working, whenever I connect my laptop to one of the interfaces it doesn't receive the IP from the DHCP.

Re: VLAN 1 is not working on stack mode

jijo_panangat — Wed, 03 Feb 2021 03:45:53 GMT

Do you receive Ip-address for any other devices in the same vlan ?

Pls check if the dhcp server is reachable from the PC vlan and other related configs.

Thanks

Jijo

Re: VLAN 1 is not working on stack mode

jijo_panangat — Wed, 03 Feb 2021 03:48:07 GMT

A tac case will help to understand the setup better and take a remote session as needed.