Configuring Virtual MAC Addresses on ASA
Hello,
I configure the virtual MAC address for a interface on ASA 5520, will enter the following command on the active unit:
failover mac address Inside 0012.3456.789a 0023.4567.89ab
The active MAC address is of the same as the Inside's burned-in MAC address of the active unit.
Similarly, the standby MAC address is of the same as the Inside's burned-in MAC address of the standby unit.
Do I get the effect of failover mac address command?
Thank you for your cooperation in advance.
Hi Bro
That’s fine really. There’s nothing wrong if you’ve configured the active MAC address the same as the Inside's burned-in MAC address of the active unit.
In an Active/Standby failover, the MAC addresses for the primary unit are always associated with the active IP addresses. If the secondary unit boots first and becomes active, it uses the burned-in MAC address for its interfaces. When the primary unit comes online, the secondary unit obtains the MAC addresses from the primary unit. The change can disrupt network traffic.
You can configure virtual MAC addresses for each interface to ensure that the secondary unit uses the correct MAC addresses when it is the active unit, even if it comes online before the primary unit. If you do not specify virtual MAC addresses the failover pair uses the burned-in NIC addresses as the MAC addresses.
P/S: If you think this comment is useful, please do rate them nicely :-)
Similar Messages
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Windows Network Load Balancing - Virtual MAC Address
Hi All,
I have environment that running 2 Exchange 2010 server with CASHT and join windows network load balancing as a node.
My question is,
If NLB service is restart, is it virtual MAC Address for NLB will change to new virtual MAC Address?
Thanks for response,
Best Regards,
Henry StefanusHi Henry Stefanus,
The NLB work mechanism will not change whether what higher application we used and I am not very familiar with Exchange NLB architecture, may the following KB and article
may help you.
When you use the unicast method, all cluster hosts share an identical unicast MAC address. Network Load Balancing overwrites the original MAC address of the cluster adapter
with the unicast MAC address that is assigned to all the cluster hosts.
When you use the multicast method, each cluster host retains the original MAC address of the adapter. In addition to the original MAC address of the adapter, the adapter is
assigned a multicast MAC address, which is shared by all cluster hosts. The incoming client requests are sent to all cluster hosts by using the multicast MAC address.
Selecting the Unicast or Multicast Method of Distributing Incoming Requests
http://technet.microsoft.com/en-us/library/cc782694(v=ws.10).aspx
The related third party article:
Building NLB Exchange 2010 RTM CAS / HT Servers (Hyper-V) – Part 1
http://blog.morecoffeeany1.com/2010/03/19/building-nlb-exchange-2010-rtm-cas-ht-servers-hyper-v-%E2%80%93-part-1/
I’m glad to be of help to you!
*** This response contains a reference to a third party World Wide Web site. Microsoft is providing this information as a convenience to you. Microsoft does not control these
sites and has not tested any software or information found on these sites; therefore, Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. There are inherent dangers in the use
of any software found on the Internet, and Microsoft cautions you to make sure that you completely understand the risk before retrieving any software from the Internet. ***
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are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
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ACE virtual mac address allocation
We're running ACE SM and seeing all the VIP addresses, NAT addresses and alias addresses in the ARP table below being assigned the same virtual MAC address. How then would a packet find the correct source/destination if all these MAC addresses are the same?
IP ADDRESS MAC-ADDRESS Interface Type Encap NextArp(s) Status
================================================================================
204.107.54.1 00.24.f9.03.08.00 vlan810 GATEWAY 300 263 sec up
204.107.54.4 00.1e.13.3c.ab.80 vlan810 LEARNED 24 7631 sec up
204.107.54.5 00.1e.13.3c.a6.00 vlan810 LEARNED 331 8992 sec up
204.107.55.5 00.1f.ca.7b.70.23 vlan810 INTERFACE LOCAL _ up
204.107.55.6 00.0b.fc.fe.1b.05 vlan810 ALIAS LOCAL _ up
204.107.54.20 00.0b.fc.fe.1b.05 vlan810 VSERVER LOCAL _ up
204.107.54.21 00.0b.fc.fe.1b.05 vlan810 VSERVER LOCAL _ up
204.107.54.22 00.0b.fc.fe.1b.05 vlan810 VSERVER LOCAL _ up
204.107.54.23 00.0b.fc.fe.1b.05 vlan810 VSERVER LOCAL _ up
204.107.54.31 00.0b.fc.fe.1b.05 vlan810 VSERVER LOCAL _ up
204.107.54.32 00.0b.fc.fe.1b.05 vlan810 VSERVER LOCAL _ up
204.107.54.33 00.0b.fc.fe.1b.05 vlan810 VSERVER LOCAL _ up
Thanks.ACE uses the concept of Virtual Mac Addresses , which are the addresses used for VIP addresses, NAT addresses (dynamic and static), and alias addresses These will all always use a MAC address in the following form 00.0b.fc.fe.1b.
If you are using single ACE SM in a cat6k box, and you are seeing duplicate MAC, its normal. Cat6k Supervisor is L2 Adjacent with ACE, Any traffic received by Supervisor in VLAN 810 will be sent to ACE and then ACE will determine which VIP that packet is going to.
Real Problem will come when you are using multiple ACE modules in Same Chassis or you are doing Chassis to Chassis ACE Redundancy. In such situation your Cat6k Switch will have duplicate MAC entries.
To avoid this, you need to keep your Contexts in diffrent context groups in each Module i.e something like this
ft group 5
peer 1
priority X
associate-context default3
inservice -
NATing to the virtual MAC address of an HSRP group problems...
Hello
I have a problem where I need to NAT various IP addresses, and need the NATd addresses to carry the virtual MAC address of the HSRP group on the onward travels..
By default, with the Cisco 871's I'm using, the packets are NATd, but carry the MAC address of the external interface.. not the virtual MAC address.
The problem is that when I failover to the standby 871, the packets will then have the MAC address of the standby (new active) 871. This causes problems because my next hop doesn't update its ARP tables (very infrequent updates).
The next hop will accept packets NATd by the standby (now live), but will continue to send reply (eg ICMP) to the live (now standby) because it hasn't updated its ARP table.
I know that I can create a NAT pool with the virtual IP address as the only member of the pool. Packets will then have the virtual MAC address, and the problem will be fixed, but if I need to NAT IP addresses to *different* NATd addresses, then I would have to create multiple HSRP groups, with different virtual IP's and MAC's, and then create multiple NAT pools...
If I can't get my next hop (which I have minimal control over) to refresh/update it's ARP table, then I will consider the multiple HSRP group config, but before I try that I would like to know whether I would be able to have multiple virtual IP's and MAC's on a single interface. Apparently there was a problem with the Catalyst 2500/4500 series where the same MAC address would be used for all HSRP groups, and you had to use burned-in MAC addresses for HSRP groups.. which wouldn't provide a solution in this case..
Any ideas on how to fix this would be greatly appreciated. BTW I have proxy-arp on external interface, and gratuitous arp.
My software version is:
Cisco IOS Software, C870 Software (C870-ADVSECURITYK9-M), Version 12.3(8)YI1, RELEASE SOFTWARE (fc1)
Synched to technology version 12.3(10.3)T2
Many thanks,
Michael Blake.Hello Michael,
you might want to have a look at the documents below, describing two techniques developed for the problem of NAT in an HSRP environement:
NAT Stateful Failover of Network Address Translation.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t13/ftsnat.htm
NAT Static Mapping Support with HSRP for High Availability
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t4/ftnthsrp.htm
Regards,
GP -
Virtual MAC-Address on Solaris 10 update 9
Hi,
i'm installing Solaris 10 update 9 on UCS B-Series (B230 M2 or B440 M2) with M72KR-Q Adapter. We create the Service Profile with vNIC associated to vNIC Template. The vNIC Template use the MAC Pool Address configurated.
When we run ifconfig -a on Solaris we can view only the original MAC-Address instead of Virtual MAC-Addres. Is this correct?
Thanks in advanceWhen you say the "original" MAC are you referring to the Hardware Default?
Ensure your MAC pool has available addresses also. You can also test unbinding the vNIC template from the Solaris service profile, and manually assigning a MAC address (watch for overlap) to the vNIC and see if that pushes to the solaris host.
If that works, then you have a pool/template issue. If not, we'll need to investigate further.
Regards,
Robert -
HSRP : routers respond with virtual mac AND physical mac to ARP requests
Hello.
I've noticed a very strange behaviour on my two Cisco's 2621 with HSRP configured.
But first, this is a simplified schema of my current network.
1. Summary
- IOS version : 12.2(37)
- File image : c2600-ik9o3s-mz.122-37.bin
- R1 is the active router.
- Both have tagged virtual interfaces : f0/0.10 & f0/0.60
- NAT functionnality is enabled.
- f0/0.10 is configured as outside.
- f0/0.60 is configured as inside.
2. Configuration samples
R1
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.0.254 255.255.255.0
ip nat outside
service-policy output parent_out_internet
no ip mroute-cache
standby 10 ip 192.168.0.2
standby 10 priority 120
standby 10 preempt
interface FastEthernet0/0.60
encapsulation dot1Q 60
ip address 192.168.1.254 255.255.255.0
ip nat inside
no ip mroute-cache
no cdp enable
standby 60 ip 192.168.1.1
standby 60 priority 120
standby 60 preempt
ip nat pool ovrld 192.168.0.2 192.168.0.2 prefix-length 24
ip nat inside source list internet pool ovrld overload
R2
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.0.253 255.255.255.0
ip nat outside
service-policy output parent_out_internet
no ip mroute-cache
standby 10 ip 192.168.0.2
standby 10 preempt
interface FastEthernet0/0.60
encapsulation dot1Q 60
ip address 192.168.1.253 255.255.255.0
ip nat inside
no ip mroute-cache
no cdp enable
standby 60 ip 192.168.1.1
standby 60 preempt
ip nat pool ovrld 192.168.0.2 192.168.0.2 prefix-length 24
ip nat inside source list internet pool ovrld overload
3. Events.
- When HSRP first runs or when there is a topology change, the active router sends correct ARP gratuitous reply packets (with the virtual MAC address)
- ARP table is filled in on the Internet router.
- When the ARP entry in the table expires it asks for the virtual IP mac address (192.168.0.2).
- R1 responds with the virtual MAC address ---- BUT ---- R2 also responds with its physical mac address !
- So packets are sent to the wrong router (R2) which can't route any packets because the NAT table is not up to date. I don't even have NAT command to synhronize NAT sessions between routers. But anyway, it should not solve my issue.
It occurs only on the NAT (outside) interface. On the other virtual interfaces it behaves as expected.
I don't have any explanations to this behaviour.
For the moment, I have to keep R2 offline and bring it back online in case of failure.
I tried several workarounds but I can neither filter ARP packets (no such function) on my router nor on my switch (too restrictive).
If I forgot any information please ask me.
Any help would be very much appreciated.Hello.
I've noticed a very strange behaviour on my two Cisco's 2621 with HSRP configured.
But first, this is a simplified schema of my current network.
1. Summary
- IOS version : 12.2(37)
- File image : c2600-ik9o3s-mz.122-37.bin
- R1 is the active router.
- Both have tagged virtual interfaces : f0/0.10 & f0/0.60
- NAT functionnality is enabled.
- f0/0.10 is configured as outside.
- f0/0.60 is configured as inside.
2. Configuration samples
R1
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.0.254 255.255.255.0
ip nat outside
service-policy output parent_out_internet
no ip mroute-cache
standby 10 ip 192.168.0.2
standby 10 priority 120
standby 10 preempt
interface FastEthernet0/0.60
encapsulation dot1Q 60
ip address 192.168.1.254 255.255.255.0
ip nat inside
no ip mroute-cache
no cdp enable
standby 60 ip 192.168.1.1
standby 60 priority 120
standby 60 preempt
ip nat pool ovrld 192.168.0.2 192.168.0.2 prefix-length 24
ip nat inside source list internet pool ovrld overload
R2
interface FastEthernet0/0.10
encapsulation dot1Q 10
ip address 192.168.0.253 255.255.255.0
ip nat outside
service-policy output parent_out_internet
no ip mroute-cache
standby 10 ip 192.168.0.2
standby 10 preempt
interface FastEthernet0/0.60
encapsulation dot1Q 60
ip address 192.168.1.253 255.255.255.0
ip nat inside
no ip mroute-cache
no cdp enable
standby 60 ip 192.168.1.1
standby 60 preempt
ip nat pool ovrld 192.168.0.2 192.168.0.2 prefix-length 24
ip nat inside source list internet pool ovrld overload
3. Events.
- When HSRP first runs or when there is a topology change, the active router sends correct ARP gratuitous reply packets (with the virtual MAC address)
- ARP table is filled in on the Internet router.
- When the ARP entry in the table expires it asks for the virtual IP mac address (192.168.0.2).
- R1 responds with the virtual MAC address ---- BUT ---- R2 also responds with its physical mac address !
- So packets are sent to the wrong router (R2) which can't route any packets because the NAT table is not up to date. I don't even have NAT command to synhronize NAT sessions between routers. But anyway, it should not solve my issue.
It occurs only on the NAT (outside) interface. On the other virtual interfaces it behaves as expected.
I don't have any explanations to this behaviour.
For the moment, I have to keep R2 offline and bring it back online in case of failure.
I tried several workarounds but I can neither filter ARP packets (no such function) on my router nor on my switch (too restrictive).
If I forgot any information please ask me.
Any help would be very much appreciated. -
Why "mac-address-table static 0000.0c07.ac01 interface FastEthernet1/0 vlan 3" in the router ?
Hi All
I did not type the following command. Why does it appear when I show run ? Which command can cause the issue? Thank you
mac-address-table static 0000.0c07.ac01 interface FastEthernet1/0 vlan 3Hello,
It looks as if you have HSRP configured. Mac address 0000.0c07.ac01 is the HSRP virtual mac address. 01 at the end of the mac represents the HSRP group number.
Hope this helps,
Please rate helpful answers.
Thanks. -
Understanding Wireless Mac Address
Hi,
I would like to know te range of mac address used for only Cisco Wireless, and I would appreciate to know how the ap and the controler assign the virtual mac address they use and how to get them from the WLC gui.
WLC - 4400
AP - Air1131
ThanksAs you add SSIDs (Service Set Identification(s)) to an access point each BSSID (Basic Service Set Identifier) receives a virtual mac address. This allows for wireless network segmentation as well as for wireless clients to communicate via LAYER 2 with each access point BSSID.
A Cisco access point takes the base radio mac address and then virtualizes the mac address as additional SSIDs are added. What is interesting is how the virtual MAC addresses are selected. Pay very close attention to the 2.4GHz and 5 GHz radios and BSSIDs.
BASE RADIO MAC ADDRESS
You can find the base radio mac address under WIRELESS->Select Access Point
Virtualized BSSID(s)
I configured a controller with 16 SSIDs. Each SSID named as 01,02,03,04,05,06, 07,08,09,10,11,12,13,14,15 and 16. I then enabled both the 2.4 GHz and 5 GHz radios. Cisco WLC access points have a limit of 16 SSIDs on each radio.
I then fired up AirMagnet WiFi Analyzer Pro to conduct a capture.
Note: The access point base radio mac address ends in A9:10.
2.4 GHz – Notice the first SSID ‘01’ is assigned the BASE RADIO MAC ADDRESS A9:10. The second SSID is appended with a .11 and so on.
5GHz – Notice the sixteenth SSID ‘16’ is assigned the BASE RADIO MAC ADDRESS A9:10. The fifteenth SSID is appended with a .11 and so on.
NOTE: The VIRTUAL MAC ADDRESSES get reused by the access point on both the 2.4GHz and the 5GHz radios.
Virtualized BSSID Assignment
Keep in mind, the assignment or order in which the virtual mac addresses are assigned in the above example has nothing to do with the WLAN IDs that are configured in the WLC. Rather, the virtual mac addresses are assigned in order by how the SSID is assigned to the access point. -
Mac address of HP LaserJet Pro MFP M126nw
Hi People,
Recently bought HP LaserJet Pro MFP M126nw wireless printer and tried to connect to WIfi. but my Wifi is Mac authenticated and I need to configure the mac address of the printer into the network. But I dont know how to get mac address of the printer.
Need you help pls.......its urgent.
Thanks....
This question was solved.
View Solution.Hi @Satishkumarsah ,
I would be happy to help you be able to get the Mac Address for the printer.
The configuration page lists current network summary and the Mac Address. To print a configuration page, do the following:
LED control panel:
1. From the product control panel, press and hold the Cancel button for 10 seconds.
2. Release the Cancel button.
LCD control panel:
1. From the product control panel, press the Setup button.
2. Open the Reports menu.
3. Use the arrow keys to select Config Report and then press the OK button to begin printing the report.
Hope this helps.
Have a nice day!
Thank You.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
Gemini02
I work on behalf of HP -
HSRP - Duplicate address on Vlan, sourced by mac-address
Hi ,
Network structure
Switch A --- Customer firewall 1
|
Switch B --- Customer firewall2
May be some one can help me.
There was a nagious alert yesterday and on investigation I found the 'Duplicate address x.x.x.x(VIP) on Vlanxxx, sourced by 0006.b19c.c5d9' error
It a HA feed from our switches which is going to customer firewalls.
On further investigation I have found on our switch A the ARP table is not learning the VIP address from this mac-address where as on switch B is learning the VIP address through mac 0006.b10c.c8d9 which is customer sonic firewall which is not a normal behaviour.
Our switches are Cisco 3560 switch.
Please if you could let me know what causing this.Hi mcgowan,
Yes, there is duplicate MAC. But, its duplicate between interface vlan address and virtual MAC address on HSRP.
when I type command :
show mac address | i 0000.0c07.ac01
It shows me :
100 0000.0c07.ac01 STATIC CPU
I think this MAC generate by system on HSRP. Currently I shutdown interface vlan 100 on switch A, like as your suggestion. But the impact is my client will get trouble when switch B is down, because HSRP is not running well.
Regards,
Rakhmad -
Please tell me what MAC address VRRP uses for the virtual IP. Do all cisco IOS use only one unique MAC for one VRRP group? What about the virtual MAC address in case master failure, does new master(previously backup) still use same virtual MAC after previous master fails?
Also I want to know if it is possible that IOS answer ARP request for the virtual IP with master's real physical MAC address in some cases.
For example, R1 e0 is configed with VRRP, its physical MAC address is MAC-PHY, virtual MAC for that virtual ip is MAC-VIR. When ping the virtual IP, master R1 answer ARP with MAC-PHY, or other MAC than MAC-VIR. Is that possible in some cases?
I used 2610 and 3610 IOS 12.3 test it. And I found it always use same virtual MAC. But I am not sure different platform/IOS has different beheavior.
Thanks in advance.Please tell me what MAC address VRRP uses for the virtual IP. Do all cisco IOS use only one unique MAC for one VRRP group?
>>>The virtual router MAC address associated with a virtual router is an IEEE 802 MAC Address in the following format:
00-00-5E-00-01-{VRID} (in hex in internet standard bit-order)
The first three octets are derived from the IANA's OUI. The next two octets (00-01) indicate the address block assigned to the VRRP protocol. {VRID} is the VRRP Virtual Router Identifier. This
mapping provides for up to 255 VRRP routers on a network.
What about the virtual MAC address in case master failure, does new master(previously backup) still use same virtual MAC after previous master fails?
>>> Yes, per above that mac-address is associated to Virtual Router.
Also I want to know if it is possible that IOS answer ARP request for the virtual IP with master's real physical MAC address in some cases.
For example, R1 e0 is configed with VRRP, its physical MAC address is MAC-PHY, virtual MAC for that virtual ip is MAC-VIR. When ping the virtual IP, master R1 answer ARP with MAC-PHY, or other MAC than MAC-VIR. Is that possible in some cases?
>>> I don;t think so since there is no interface command to tell router to use BIA for VRRP much like the HSRP.
I used 2610 and 3610 IOS 12.3 test it. And I found it always use same virtual MAC. But I am not sure different platform/IOS has different beheavior.
>>> It's not platform dependent it's how it operate per RFC 2338.
Please rate helpful posts. -
Configure active and standby mac address in failover
Hi guys,
I just have a doubt that, if I configure the active and standby mac address in failover, does it will cause any downtime?
As I planning to configure the active and standby mac addresses in failover during production time and not wish that it will bring any downtime to me.
Besides that, just need some guideline that do I need to put all the interfaces' mac addresses in failover?
failover mac address GigabitEthernet0/0 0022.90fe.2000 0022.90fe.2001
failover mac address GigabitEthernet0/1 0022.90fe.3000 0022.90fe.3001
failover mac address GigabitEthernet0/2 0022.90fe.4000 0022.90fe.4001
failover mac address GigabitEthernet0/3 0022.90fe.5000 0022.90fe.5001Hi Marius,
Seem like set the failover MAC address was not working for me.
Last friday I was tested the failover MAC address.
TEST 1
1, Power off primary ASA and secondary ASA work as active.
2, 2821 router able to learn the correct arp entries.
TEST 2
1, Power on primary ASA and failover from secondary to primary.
2, 2821 router able to learn the correct arp entries from ASA.
3, Set failover MAC address, power off primary ASA and secondary ASA be active.
4, 2821 router unable to learn the correct arp entries.
TEST 3
1, Removed failover MAC address from secondary ASA.
2, 2821 router still unable to learn the correct arp entries from ASA.
3, Power up primary ASA and secondary ASA still in active.
4, 2821 router still unable to learn the correct arp entries from ASA.
5, Reboot 2821 router and it able to learn the arp entries from ASA.
I am not sure this issue from router or from the ASA. But I guess I will try to upgrade the router in term of software and hardware. -
Transparent ASA and Mac-Address's
Experts,
I’ve recently installed a pair of 5525X’s in transparent mode to protect some internal segments. In reading about transparent mode I thought I read that the ASA will “proxy” the connection when going from the Layer 3 side (North) to the actual physical South side host. For an “Outside/North” host (vlan 700) to talk to an “Inside/South) host (vlan 800) the ASA will pass it’s mac-address to the outside host (or gateway) as the destination to send the packet. Prior to building this infrastructure I thought I would see all ARP entries on the Layer 3 (North) side to have a mac-address of the interface of the ASA for all protected hosts. I do not see that on the SVI interface but do see the real mac-address of the “South” side protected machine. When looking on a protected machine I do see the default-gateway ARP entry to be the actual mac-address of the SVI on the switch and not the mac-address of the ASA which I thought would be the case as well. Everything is working as advertised (or so I think) as removing or adding ACL’s does limit or allow traffic so it appears to be working. I’m just checking that my initial assumption of the mac-address of the ASA being on every ARP entry was/is incorrect. From what I can tell the ASA passes the mac-address's from each side of the bridge-group to the other.
Thanks,
KenHi Ken
Yes, this is correct. In transparent mode, the ASA is effectively a passive device in this perspective. The devices on either side of the ASA will see the "real" MAC addresses.
Note this behaviour will change if you configure NAT on the ASA.
HTH.
Barry Hesk
Intrinsic Network Solutions -
OK; have been trying to setup a test VM based RDS deployment for a few days now with no luck.
this error mentioned above:
"Server <server name> either does not have a virtual switch configured or none of the configured virtual switches have an IP address assigned" error is driving me nuts!
I have removed and re-added the RD Virtualization Host role numerous times, each time having the "create a virtual switch" checkbox selected, but it did NOT create any virtual switch.
I created the external virtual switch manually and tried to create the desktop collection again, no luck with the same error.
a few questions:
1. you don't assign IP to a switch! you assign IP to Network Interfaces. why does the error puts it like this?! it is technically wrong.(yeah yeah I know all about how you'd assign IP to managed switches in real world to telnet into them and manage them.
you know better than me that it is not the case here!)
2.the RDS Virtualization hosts are using their wifi card as the card for the virtual switch. could that be the reason? I even disabled their unplugged wired NIC just to make sure that the wifi is the only available option for the RDS wizard to use for the
virtual switch creation; but it didn't use it and it didn't create any virtual switch automatically.
3.if WIFI nic is indeed the reason, is it your suspension or an official documents is there somewhere stating so (that the WIFI NICS on a Virtualization hosts are not supported as the hub for a virtual switch).
4.what are the properties of the virtual switch the RDS requires? does it have to be external? why can't it work even with my manually created external switch?
5.how would I fix it?
P.S: the environment is made up of 2 laptops, having windows 2012 R2 trial installed on them, using their wifi to connect to the out world. no cable is plugged into their wired NIC card.Hi,
Thank you for posting in Windows Server Forum.
The simplest short term solution was to connect each computer to a small switch that had no other connectivity. This brought up the link light on the external NIC and allowed the creation of the collection to complete. You need to use an external switch. You
can create one external switch which might fix the problem.
Please check below article for information.
VDI Deployment Error About Virtual Switch
In addition please referthis article for information regarding virtual switch.
Hope it helps!
Thanks.
Dharmesh Solanki
TechNet Community Support -
Can't get past configuration utility to find MAC address
How do I locate my iPod Touch's MAC address prior to completing the configuration utility so that I can add the address to a router's MAC filtering list? It doesn't appear that I can do anything with the iPod unless I first go through the config process...but if I don't have the MAC address, I can't connect to my WiFi.
Any suggestions would be appreciated.
Thankslllaass wrote:
With iOS 5, you can setup the iPod via wifi without connecting the iPod to a computer. However, you have connect to wifi to do that. The poster is trying to set it via wifi but can't since he does not know the MAC address to add to his router so the iPod can connect to wifi. That is why I told him to set up via USB and iTunes.
cliftonfromrichmond wrote:
Well, you don't need to add the iPod's MAC address to the router filter table until AFTER you set up the iPod.
Think about it: To set up a new iPod you use the USB/Docking cable to connect the device to a computer that is running iTunes so you can use iTunes to set the device up. During the setup process you are using the computer's network connection to transfer data to and from Apple.
After the device is set up you can retireve the MAC address.
FYI: My home network is set up with MAC filtering....
OK, fine. And what are the chances his new iPod is not running iOS5? (HINT: He didn't add an iOS tag to his post...) And if I read his post correctly this is a NEW iPod because he has to run through the configuration utility.
I'd say that based on a recent thread about a replacement iPod not running iOS5, I'd say the odds are pretty darned good that the OP's iPod is not running iOS5. With that being said, he cannot setup his iPod over a wireless connection which negates the necessity to retrieve said MAC address. He must connect his iPod to a computer.
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