trunk fiber 3750 and 3850

Similar Questions

• VLAN Trunking between 6248 and 2848

  Hello

  I have a Powerconnect 6248 switch connected to a 2848 and I try to get a VLAN on the 2848.

  VLAN working and properly receive DHCP addresses, traffic lanes and DNS runs on the 6248.

  The Protocol DHCP, DNS server is connected to port 1 on the 6248.

  When I create a Trunk port on 3 the 6248 Port, allow all VLANS through it, creating a trunk on port 1 of the 2848 on VLAN10 and try to plug in devices inside, they can see all other devices connected to the L3 switch.

  The two switches are running the latest firmware and the L3 on his own works as expected. I can't get any kind of circuits working at L2, tried with normal cable and crossover switch.

  Here is the config of the L3 6248. Switch 2848 L2 has a blank canvas with 10 VLANS created on ports 1,2,3,4 with port 1 as the trunk port installation.

  Any ideas pleeease? Anyone? It drives me crazy.

  ************************

  <sub>! Current configuration:
  ! Description of the system "Powerconnect 6248, 3.2.0.7, VxWorks 6.5.
  ! Version of the software system 3.2.0.7
  ! Passage mode is configured as disabled
  !
  Configure
  database of VLAN
  VLAN 10,20,30
  VLAN 10 1 routing
  VLAN 20 2 routing
  VLAN 30 3 routing
  
  output
  battery
  1 2 Member
  output
  the IP 192.168.0.1 255.255.255.0
  field of IP domain name
  name-server IP 192.168.1.10
  IP routing
  interface vlan 10
  Routing
  IP 192.168.1.1 255.255.255.0
  output
  interface vlan 20
  Routing
  address 192.168.20.1 255.255.255.0
  IP helper-address is 192.168.1.10
  output
  interface vlan 30
  Routing
  192.168.30.1 IP address 255.255.255.0
  IP helper-address is 192.168.1.10
  output
  level password user name 'administrator' encrypted 15 5f4dcc3b5aa765d61d8327deb882cf99
  l2relay DHCP
  DHCP l2relay vlan 10-90
  !
  interface ethernet 1/g1
  switchport mode general
  pvid switchport General 10
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 10,20,30
  output
  !
  interface ethernet 1/g2
  switchport mode general
  pvid switchport General 10
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 10
  output
  !
  interface ethernet 1/g3
  switchport mode trunk
  switchport trunk allowed vlan add 10.20
  output
  !
  interface ethernet 1/g4
  switchport mode general
  pvid switchport General 10
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 10
  output
  !
  interface ethernet 1/g5
  switchport mode general
  pvid switchport General 10
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 10
  output
  !
  interface ethernet 1/g6
  switchport mode general
  switchport General pvid 20
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 20
  output
  !
  interface ethernet 1/g7
  switchport mode general
  switchport General pvid 20
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 20
  output
  !
  interface ethernet 1/g8
  switchport mode general
  switchport General pvid 20
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 20
  output
  !
  interface ethernet 1/g9
  switchport mode general
  switchport General pvid 30
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 30
  output
  !
  interface ethernet 1/g10
  switchport mode general
  switchport General pvid 30
  No switchport acceptable-framework-type general tag only
  VLAN allowed switchport General add 30
  output</sub>

  After turning off spanning tree on the 2848, all works now.

  VLAN, trunking everything.

  Thanks for the help! :)

  I hope that if someone else can use what it took me ages to develop. I plugged on Netgear switches etc and they seem to work.

  The issue was going on between the dell 6248 and 2848, Spanning tree is enabled on the default 2848. If I was going to the Netgear via the 6248, then at the 2848 switches worked.

  My config on the l3 also works very well if someone would use :)

• CiscoWorks LMS 4.0.1 and 3850 switch support

  HI, I want to know if the 3850 switch is supported in ciscoworks LMS 4.0.1 I added devices, successful inventory collections but peripheral icon is blue with question mark '? ' and config sync always fails.

  I tried to download the packages to install it, but I couldn't find it.

  Thanks help fo

  3850 is supported on LMS 4.2.3. Check the list supported here:

  http://www.Cisco.com/en/us/docs/net_mgmt/ciscoworks_lan_management_solution/4.2.3/device_support/table/lms423sdt.html

  You must upgrade to 4.2.3 LMS or 1.3 FT go.

  -Thank you

  Vinod

  *Side encourages contributors and it's really free. **

• Problem with a SIP Trunk between VCS and CUCM

  Hello world

  I created a SIP Trunk between control VCS (X7.1) and a CUCM 8.6.

  I followed this Cisco_VCS_Cisco_Unified_Communications_Manager_Deployment_Guide_CUCM_6-1_7_8_and_X7 - 0.pdf deployment guide.

  The trunk is in place, but I have the following problem: I can ring since an EX90 recorded on the VCS for a registered on the CUCM 9951 but when I take the call, I have a busy signals (audio and video). When I on the EX90 9951 ring, I have the following message on VC: can not reach the contact.

  I have a 503 service unavailable status on the call history and "call rejected" on the event log.

  My transformation is OK and the call is sent to my neighbor CUCM zone

  You have an idea to solve this problem?

  Thanks for your help

  Best regards

  Bruno Z.

  Hello

  Yes, it's true! It seems at first glance a problem with codec negotiation when I see the reason 47 code.

  in any case set the region to G.711 trunk phone in case if you have different device pool and the trunk region and ip-phones.

  make G.711 end to end and test again.

  Thank you

  Alok

• Pass the trunk between catalyst and PIX

  Hello

  Yesterday I had very good response on the forum how to create the VLAN on PIX, I created the subinterfaces and VLAN which their responsibilities. I configured the IP addresses as well. Did the same on the switch of Cat - created SVI and assined their IP add back. Cat shows switch port trunking is correctly but I can't ping from PIX to the switch and vice versa. Help, please.

  RVR

  Is it possible for you to view the configuration of the PIX? At least the configuration of the interface?

  And configuration of the trunk on the switch interface?

  Concerning

  Farrukh

• Fail to implement channel ports in cisco 3750 and ESXi 4u1

  I have set up a vswitch with a rising and electric connection for multiple VLANs. Everything works fine, when the network admin replicate the configuration in a second network port and set up a port with two interfaces channel all my communication with my network management interface is lost, but the test of the esxi management network is successful.

  The vswitch using ip hash and the use of the pswitch political of the src-dst-ip.

  Thanks in advance for any help you can provide.

  F.F.: This is the configuration of the switch:

  interface
  GigabitEthernet1/0/17
  switchport trunk encapsulation dot1q
  switchport
  trunk mode
  switchport nonegotiate
  channel-group mode 3 on
  spanning tree
  PortFast trunk
  spanning tree enable bpduguard
  
  interface
  GigabitEthernet1/0/7
  switchport trunk encapsulation dot1q
  switchport
  trunk mode
  switchport nonegotiate
  channel-group mode 3 on
  spanning tree
  PortFast trunk
  spanning tree enable bpduguard
  
  interface
  Port-canal3
  switchport trunk encapsulation dot1q
  switchport
  trunk mode
  switchport nonegotiate
  spanning tree portfast trunk
  spanning tree
  bpduguard enable
  
  port-channel-src-dst-ip load balancing

  Take-off of VLANs allowed 4094... the native should not be part of the traffic that will flow on the link...

• VLAN trunks on bridges and native

  I need a different VLAN native on the side of the radio and ethernet. Is this possible on 1410 nonroot bridge?

  Radio VLAN native is to support the management on the bridges of 1410. I also need to attach a single device of VLAN someone else nonroot bridge and I don't want to have to put in a switch comes out who needed of VLAN.

  The bridge takes support only one SSID. You must assign the SSID to the VLAN native

  1. create sous-interfaces on the radio and Ethernet interfaces.

  2. enable 802. 1 q encapsulation on the subinterfaces and assign a subinterface in the VLAN native.

  3. assign a bridge group to each VLAN.

  4. (optional) select WEP on the VLAN native.

  5 assign the SSID of the bridge to the VLAN native.

  To assign an SSID to a VLAN, and how to to enable a VLAN on the radio of bridge and Ethernet ports

  For more information click on this link.

  http://www.Cisco.com/en/us/docs/wireless/bridge/1400/12.3_8_JA/configuration/guide/p38vlan.html

• Issue of Telnet and SSH on Cisco 3750.

  I turn on Cisco 3750 and everything so I wasn't able to connect in the area. I even changed the source interface and update transport under the VTY lines input method, no luck.

  Can I choose to disable SSH by removing the corresponding lines of configs and RSA keys. And I changed the entry to transport back to Telnet. After the reboot of the switch, I'm still not able to connect despite the fact that the box is accessible.

  Any help?

  Thank you

  Jean-Marie

  Hello

  This should help to confirm the configuration and troubleshooting SSH on your device: -.

  http://www.Cisco.com/c/en/us/support/docs/security-VPN/Secure-Shell-SSH/4145-SSH.html

  I hope this helps.
  Kind regards
  Dinesh Moudgil

  PS Please rate helpful messages.

• Ethernet VMware with Cisco EtherChannel and Trunking Question

  Hello

  Trying to get our etherchannels works correctly with our network administrator. Here is our config with a few questions.

  1. as it is to create the trunk between switch and host directly, can I use spanning tree portfast chest edge ?

  2. when don't we use no ip address and when not for this configuration? I see online showing examples with and without it.

  3. in some articles, he described in access mode , while in others he said dot1q trunk mode. See here for the access mode. Admin think it should use dot1q.

  4 Etherchannel is fully support and preferred extending from links on maps, right? Not all of the links on the same card?

  5 is this the case in order to change the load balancing algorithm in vmware first or first to the work of cisco? I did first vmware. (IP-hash)

  It's on a series with 4 cards/blades 6500 switch.

  !
  interface Port-channel200
   switchport
   switchport access vlan 81
   switchport trunk encapsulation dot1q
   switchport trunk allowed vlan 69,81,172,896
   switchport mode trunk
   switchport nonegotiate
  !
  interface GigabitEthernet2/35
   switchport
   switchport access vlan 81
   switchport trunk allowed vlan 69,81,172,896
   switchport mode trunk
   switchport nonegotiate
   spanning-tree portfast edge
   channel-group 200 mode on
  !
  interface GigabitEthernet8/10
   switchport
   switchport access vlan 81
   switchport trunk encapsulation dot1q
   switchport trunk allowed vlan 69,81,172,896
   switchport mode trunk
   switchport nonegotiate
   spanning-tree portfast edge
   channel-group 200 mode on
  

  DITGUY2012 wrote:

  Wow Josh. If only you had written documentation. That's the trouble with him. People like me get final instructions, because we're not the guys from network 24 x 7. Great documentation would be layout, the reasons to go this way or that way you did just. That being said, here's my summary based on this discussion.

  1. we have several VLANS that descends from 3 links on the etherchannel. Thus, we should use mode trunk because there is not a single.

  2. we have an another etherchannel with just 1 vlan (vmotion), but in all of two links. This should be the access mode. Or is it still trunk because it's the multiple links?

  3. I don't know what crash dump logger is, or how it applies to my situation.

  4. I saw the bpduguard setting before what exactly is the syntax to use for us? 6500 series.

  5. I don't know if our switch would deliver on that port. How can I tell? At this moment I have switchport setting in there.

  Thank you!

  No problem for reference, the other question of documentation is one of the languages. Their word etherchannel on HP networking hardware, 'trunk' and has nothing to do with the discussion of port "access vs circuit", which they call "tag unidentified vs.

  1 Yes

  2. you would certainly make an access port.

  3. If your server never begins to have a problem with break, VMware can a copy of the accident for the debug log. You can see an article on setting up here: put in place the collector of Dump ESXi 5.0 | VMware vSphere Blog - VMware Blogs.

  4 I'm sorry I'm not familiar with this model

  5. I think if the switchport parameter is here and connectivity seems to work, you can consider yourself safe

• VCB and Fiber Channel without

  Hi all

  I have an interesting problem, and I'm curious to know if anyone else has run into it...

  I have a HP DL360 with Windows Server 2003 Enterprise Backup Exec 12.5 and VCB 1.5.  The server is connected to a switch of fiber supporting a Compellent SAN.  VMFS volumes are presented to the DL360 ReadOnly and VCB works perfectly.

  The question is in a reboot of the power of attorney.  The server is located in the Windows startup screen and never loads completely.  If I disconnect the fiber cable and reboot, it does so very well.  I can then reconnect it, scan the LUN and continue on as usual until the next time I restart the server.  I replaced the HBA already, so just try a different material (I have several of these boxes by flying over the building).

  I know that this is not necessarily a problem with VMware, but I thought that maybe someone else ran in this at one point...

  The problem is that your LUN is read-only.  Even if VCB should not be written on these discs, windows wants to be able to have this type of access, while it is coming.  So, it will try to open records in R/W mode, that will fail and causes Windows hang.  So, for a permanent solution, your VCB should have RW access to these LUNs.

  See also here: http://communities.vmware.com/thread/168593

• Vlan trunk between switches traffic encryption

  Hello

  Can someone guide me to some documents and other resources on how to encrypt the traffic between 2 switches. The switchces will be connected with fiber and use the marking dot-1 q. And I wan't to encrypt all traffic to shared resources.

  I was thinking about L2TP, but I have not found a good description on how to implement this. I have two 3750 switches, I thought I could use.

  Thank you for any input,

  Kind regards

  Paul Mathiesen

  mnemonic

  Norway

  Hello

  Thanks for the reply. I had a look at effect and it seems good. I would have liked to use something P2P but also limit the amount of MAC addresses on the "wire". But let me first give you an understanding of the task:

  We have two sites, linked by fiber, and we want to create a trunk VLAN everywhere and to expand the broadcast domains to you another site.

  The carrier FOOL, has a limitation on the number of MAC addresses, they allow the service to fiber, 100.

  We also encrypt the datatraversing this connectivity.

  MACsec wuold work 100% exept the source and dstination MAC addresses are still sent (at least according to https://docs.google.com/viewer?a=v&q=cache:LEf2qOmYZyYJ:www.ieee802.org/1/files/public/docs2011/bn-hutchison-macsec-sample-packets-0511.pdf+&hl=en&gl=za&pid=bl&srcid=ADGEESgmAHXpDOY0RBAE-Rv1HDpu_C_gkeSPN4cv6NGgyP0M1aXVu0UqzCfxo8t_P41ep6J37k4OLKnjfp1M9hoTDHxY22WGz2h7yB7YRLyPvRUbGS8TICzvEMlG92xqbhy6RWFugmnj&sig=AHIEtbTfu0LQIJejdYidE6yzq4lpPifxjQ
  )

  And who tempt me to eat in the limit of MAC 100.

  Ridiculous I know, but we are looking for an out-of-the-norm plan...

  Thank you

• 2 GB Cisco EtherChannel Cisco 3750 x 2960S

  Hello

  Im trying to configure an EtherChannel between my stack of 3750 and my stack of 2960S.

  I have 2 3750 x in the form of battery. (2 switches).

  I have 4 2960 s in the form of battery. (4 switches).

  I need to create a channel of 2 GB between them. My heart is the 3750 and my stack of 4 2960 s is on another floor, so I want to create a channel of 2 GB between them.

  I know that you can create a PO between them, but what I want to do is to create a channel of 2 GB between them that run at the same time, active on both ports of 1 GB.

  Is this possible and how? This is my current setup until now:

  Change the battery 3750

  Interface Port-channel10
  Description ETHSW04 - 1.5
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  spanning tree cost 15

  Interface Port-channel11
  Description of uplink BRP at ETHSW04 - 1.5
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  spanning tree cost 1

  interface GigabitEthernet1/0/39
  Description ETHSW04 uplink - 1.5
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  channel-protocol lacp
  active in mode channel-group 10

  interface GigabitEthernet1/0/40
  Description ETHSW04 uplink - 1.5
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  channel-protocol lacp
  active in mode channel-group 10

  interface GigabitEthernet2/0/39
  Description Uplink of BRP - uplink ETHSW04 - 1.5
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  channel-protocol lacp
  active in mode channel-Group 11

  interface GigabitEthernet2/0/40
  Description Uplink of BRP - uplink ETHSW04 - 1.5
  switchport trunk encapsulation dot1q
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  channel-protocol lacp
  active in mode channel-Group 11

  ---------------------------------------------------------------------------------

  Battery 2960 s

  Interface Port - Channel 1
  Description CORE01 uplink
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  spanning tree cost 15

  Interface Port-canal2
  Uplink BRP to CORE02 description
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  spanning tree cost 1

  interface GigabitEthernet1/0/47
  Description CORE1-G1/0/39
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  channel-protocol lacp
  active in mode channel-group 1

  interface GigabitEthernet1/0/48
  Description CORE1-G1/0/40
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  loop of spanning tree guard
  channel-protocol lacp
  active in mode channel-group 1

  interface GigabitEthernet4/0/47
  BRP-CORE2-G2/0/39 description
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  spanning tree portfast
  loop of spanning tree guard
  channel-protocol lacp
  active in mode channel-group 2
  !
  interface GigabitEthernet4/0/48
  BRP-CORE2-G2/0/40 description
  switchport trunk allowed vlan 1,210,220,214,216,220,306,406
  switchport mode trunk
  added mac-SNMP trap notification change
  deleted mac-SNMP trap notification change
  spanning tree portfast
  loop of spanning tree guard
  channel-protocol lacp
  active in mode channel-group 2

  Thank you...

  Not possible AFAIK.
  LACP will provide examples of the use of load balancing and redundancy that is good enough for most.
  Other then that you would have to watch the 10GB uplinks between switches for more bandwidth.

• Port of WLC 5508 and 4510 - channels

  LACP and PAgP are not based on the controller and it seems that the 4500 series will use no LAG.

  Interface Port-channel10
  Description Port-Channel WLC
  switchport
  switchport mode trunk
  service-policy input AutoQos - 4.0 - entry-policy
  service-policy output OUTPUT-PRIORITY-POLICE-ETHERCHANNEL

  interface GigabitEthernet3/1

  Cisco 5508 wireless controller description
  switchport mode trunk
  active in mode channel-group 10
  point to point spanning tree-type of link
  !
  interface GigabitEthernet3/2
  Cisco 5508 wireless controller description
  switchport mode trunk
  active in mode channel-group 10
  point to point spanning tree-type of link

  I get the error message "lacp not enabled on the remote port..". I removed the 2nd fiber cable and removed the channel group so I can get the WLC online. Any help would be greatly appreciated.

  In order to get the channel of ether to work with the WLC, you must change your configuration of:

  !

  interface GigabitEthernet3/1
  active in mode channel-group 10
  !
  interface GigabitEthernet3/2
  active in mode channel-group 10
  !

  Mode it

  !

  interface GigabitEthernet3/1
  channel-group 10 mode on
  !
  interface GigabitEthernet3/2
  channel-group 10 mode on
  !

  Mode IT is said the switch to Link Aggregation Protocol try and negotiate by using one of two LACP or PAgP control protocols.

  using ONE fits in the configuration guide when you enable the option Cisco WLC LAG.

• I had a breakdown and even if my host has been turned off, he showed only disconnected and HA na not kick in.

  The trouble is, my Dev Environment has worked well, showing does not and HA worked, then that my production did not.

  The cause of the blackout was a power failure that the power off switch.

  The production host is a 3850 M2 and development hosts are HS21 blades in a BladeChassis.

  What would cause the server show disconnected?

  Due to the floods here, I am unable to work and check power redundancy, or if the House of all the server went down or just simply switch.

  How storage is configured on the server that is located behind the failed switch.  It is also configured the switch failed (iscsi or nfs), or is it fiber attached?

  If its fiber attached and the other virtual machines were running, the other guests could not power on the virtual machine because files would still be locked.

  What is the configuration of your HA settings on the cluster?  Leave power on or power off the power?

  If they all leave it turned on, and then only a physical fall of the server or SAN connection would allow an HA event succeed (because file locks would be then released).  otherwise the VM running isolated, but no other host can power on the virtual machine.

  It is probably a good event to happen because it caused a power failure but not a serious enough to make your life hell, it should give you more reason to push redundant switches on the side of production to ensure that a single switch failure is not bring down the environment.

• Server files to fiber without Xsan?

  Hi all

  We did a Mac Mini server for a long time now on ethernet on our small business network, and we recently replaced one of our editing Mac Pro (2010 model) with a more recent 2013 videos.

  The Mac Pro 2010 has a fiber inside, and I wonder if it is possible to use it to replace our server Mac Mini (El Cap) and run as a file on the network server using fibers. Our firewall is a Sonicwall NSA 4600, which has the ability to take entry fiber connections, then all customers would be connected via ethernet. All our data would be on the internal SSD drives, and configure a RAID is not necessary (there are already solutions secondary and backup in place).

  I have little or no experience using fiber (a company from the outside set up our private network edition). Before I jump into the rabbit hole, which was wondering is) adding a fiber to a network machine works similar to ethernet (i.e. just setting IP, Sub, etc.)? (B) what I need to set up an XSAN system with controllers separate metadata etc., or can I simply connect the mac pro in the switch firewall and SMB/AFP share as he was connected by ethernet? And (C) can other services OS X Server as a VPN server, RADIUS, or OD work through the fiber connection, or do I need to run an Ethernet line separate to those of work (or even to keep the Mac Mini for these functions)?

  The advantage that I would hope to achieve is a debit to transfer files to and from customers.

  Thank you!

  There are two types of use of fiber that your current Mac Pro could use.

  1. Ethernet over fiber - used for the connection of normal computer network
  2. FDDI over fiber - used for the connection of SAN storage

  It's not not obvious from your post that you are using. Ethernet over fiber option is mainly for going the distance, but could also be used with a faster for example 10 Gbit/s network connection.

  Your current Mac Pro run Xsan? If it means that he uses FDDI.

  Note: Everything needs to use compatible versions for Xsan for work.

  You can get the two 10 Gbps, that interfaces Ethernet fiber and FDDI interfaces for use with a Mac, this is done with a direct Thunderbolt adapter, or a bolt of lightning to box PCIe in which you want to keep a PCIe card - most likely even the currently in your Mac Pro.

  FDDI is only used for storage connections and is normally only used by servers. (And the storage itself.) It permanently unusable for normal networking, servers would also have Ethernet connections for this.

  A 'SAN' allows several servers share a single storage via direct connections (FDDI) device, normally only one computer can be connected to a storage device. The Xsan software or a similar software for other platforms acts as a controller to ensure these several servers can use the same storage without conflict.