Ethernet Switches & Routers

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New Member
Posts: 1
Registered: ‎01-28-2017

connecting two switchs

hello,

i want to know how can i connect two switches using uplinks ports sw1(ICX7150-48PF) sw2(ICX7150-24)

using cat6 cable

Broadcom Moderator
Posts: 238
Registered: ‎06-30-2010

Re: connecting two switchs

Hi,

 

Both the ICX7150-48PF and the ICX7150-24 have 2 x 10/100/1000 RJ45 uplink ports, you should be able to interconnect these ports using Cat6 and configure ports as trunk (tagged) for VLANs which you want to interconnect the devices with

 

Please provide additional information regarding exactly what you want to achieve

 

Regards

Mick


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Frequent Contributor
Posts: 137
Registered: ‎07-20-2015

Re: connecting two switchs

What the Moderator said is absolutely spot on, and it would work with the uplink ports or any of the other 48 copper ports AND all SFP slots.

 

What differentiates the uplink ports from the other 48 ports is that you can Stack the switches into a single, logical chassis using the special uplink ports without the need to buy the ubiquitous 1G-SFP-TWX stacking cables that work with virtually the entire Brocade ICX Family.  If this is what you want to do, search for Brocade Stacking.  There is a "stack secure setup," "stack enable," and "hitless-failover enable" on the ICX style switches among priority settings, Stack MAC addres setttings, etc.  It is worth a read for sure.

 

*******

 

What the moderator was referring to with TAGGED ports is that they carry the industry standard, 802.1Q tagged frames (at layer-2 of the OSI Model)...    It basically allows you to TRUNK multiple VLANs between your switches.

 

On a Cisco, that will look something like this:

interface GigabitEthernet3/1
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 100,1234
switchport mode trunk
!

 

On a Brocade, it is easier the biggest difference is that you put the ports within VLANs instead of define the VLAN information on each and every port... Something like this (You can TAG the same port in many VLANS):

 

vlan 100 name EXAMPLE by port
tagged ethe 1/1/5
!

 

 

For a regular, access port, you use the "untagged" keyword on brocade, and that is essentially the same as Cisco's "switchport mode access" where you specifiy the VLAN on the port itself.  In contrast, an UNTAGGED port transmitts the Layer-2 Ethernet frames WITHOUT any 802.1Q tags.

 

The caveat of course being an UNTAGGED port can be a member of only a single VLAN (which is the same for every vendor).   It all makes sense when you realize a Layer-2 Ethernet frame can contain exactly one (1) 802.1q TAG -OR- can be UNTAGGED with that field left BLANK.

 

 

If a Frame comes into a port that is UNTAGGED in VLAN 5, that frame becomes a member of VLAN 5... (obviously, the same frame cannot belong to multiple VLANs; hence, the rule it cannot be UNTAGGED in multiple VLANs).

 

Similarly, if a frame is sent TAGGED (that 802.1Q field populated) it cannot come into a non-trunk (UNTAGGED) port because it cannot become a member of a different VLAN (Hence, the reason a TAGGED and an UNTAGGED port will not communicate).

 

It should be noted the Brocade devices DO support also Native VLANS only these dual-personality ports are known in Brocade Terminology as "dual-mode."  What a dual-mode port does is allow the port ot send/received TAGGED and UNTAGGED on the same interface.  Basically it functions like a Trunk above, with the caveate that any incomming, untagged framess received on it get put into the default VLAN unless it is something like "dual-mode 2468" in which case it will belong to VLAN 2468 upon entering untagged on that Interface.  Similarly, any traffic that is a member of VLAN 2468 would be transmitted UNTAGGED from that interface as well.

 

All of that said, the default VLAN is a parking-space for interfaces (ports).

 

 

 

I hope the above helps.

 

 

 

 

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