From: Narbik Kocharians (narbikk@gmail.com)
Date: Sat Feb 28 2009 - 08:04:53 ARST
You welcome.
On Fri, Feb 27, 2009 at 7:00 PM, mahmoud genidy
<ccie.mahmoud@gmail.com>wrote:
>
> Narbik,
>
> This is so nice from you mate.
>
> I have many 3550s in my office. I will lab it again at work with 3550s and
> it should work.
>
> Thanks so much and much appreciated.
>
> Mahmoud.
>
>
>
> On Sat, Feb 28, 2009 at 1:22 PM, Narbik Kocharians
<narbikk@gmail.com>wrote:
>
>> Mahmoud,
>>
>> If you like i can slap couple of 3550s and few routers so you can test the
>> entire lab. Would you want that?
>> I normally do not offer that, but hey...... if my racks are not being used
>> i do not mind to offer it for free for an hour or so, if it helps.
>>
>>
>>
>>
>>
>> On Fri, Feb 27, 2009 at 3:13 PM, mahmoud genidy
<ccie.mahmoud@gmail.com>wrote:
>>
>>>
>>> Thanks Narbik for this test scenario. I labed it and I got partial
>>> success. I have only 3560s. So I used the IPX addressing.
>>>
>>> - I was able to ping the IPX addresses normally between the two VLANs
>>>
>>> - I tried to disable the Auto learning of MAC addresses (no bridge 1
>>> acquire) But again it is not working. I still can ping between IPX
addresses
>>> and I can see the Dynamic MAC addresses learned and in FORWARD state.
>>>
>>> - Discarding specific MAC as well didn't work. I tried to discard specif
>>> MAC (bridge 1 address 0000.1111.1111 discard) and of course I kept
dynamic
>>> learning enabled. I still can see the MAC address in FOWARD state in the
>>> bridge table.
>>>
>>> It may be a bug in my Catalyst IOS [Version 12.2(25)SEE4, RELEASE
>>> SOFTWARE (fc1)]. Because the configuration and the concept is
>>> straighforward. :(
>>>
>>> Thansk,
>>> M Genidy
>>>
>>>
>>> On Sat, Feb 28, 2009 at 2:54 AM, Narbik Kocharians
<narbikk@gmail.com>wrote:
>>>
>>>> *Try this lab and see if it helps.*
>>>> **
>>>> *Use the following topology:*
>>>>
>>>>
>>>>
>>>> The F0/0 interface of BB2 is connected to SW1 which is a 3560 and F0/1
>>>> interface of this switch is connected to SW3 which is a 3550. This port
>>>> should be in VLAN 20.
>>>>
>>>>
>>>>
>>>> The F0/0 interface of BB3 is connected to SW1 which is a 3560 and F0/1
>>>> interface of this switch is connected to SW3 which is a 3550. This port
>>>> should be in VLAN 30.
>>>>
>>>>
>>>>
>>>> *Layer 3 addressing:*
>>>>
>>>> *BB2s FastEthernet (which one? To be determined by you, read on you
>>>> will see):*
>>>>
>>>> *IPX net address: ABCD, IPv6 address = 23::2 /64, Mac-address =
>>>> 0000.2222.2222*
>>>>
>>>> * *
>>>>
>>>> *BB3s FastEthernet (which one? To be determined by you, read on you
>>>> will see):*
>>>>
>>>> *IPX net address: ABCD, IPv6 address = 23::3 /64, Mac-address =
>>>> 0000.3333.3333*
>>>>
>>>> * *
>>>>
>>>> *You see by assigning the addressing to F0/0, you will be dealing with
>>>> 3560 switch and by assigning the addressing to F0/1, you will be dealing
>>>> with 3550 switch so you need to determine that based on the task. *
>>>>
>>>> * *
>>>>
>>>> *Task 1*
>>>>
>>>>
>>>>
>>>> Configure the appropriate switch such that routers BB2 and BB3 can
>>>> forward NON-IP traffic between VLAN 20 and 30; Fallback Bridging should
be
>>>> configured to accomplish this task. If this task is configured properly,
you
>>>> should be able to use Ping to test this configuration using IPv6 or
IPX
>>>> addressing identified in the IP addressing chart.
>>>>
>>>>
>>>>
>>>> * *
>>>>
>>>> *Note since the task specifies that the test should be conducted using
>>>> IPv6 and IPX, 3550 switches will be the only choice. Since these switches
do
>>>> NOT have inherent support for IPv6, these switches looked at IPv6 traffic
as
>>>> NON-IP, just like IPX.*
>>>>
>>>> * *
>>>>
>>>> *To configure Fallback Bridging:*
>>>>
>>>> * *
>>>>
>>>> *On SW3*
>>>>
>>>> * *
>>>>
>>>> *The following command assigns a bridge group number (In this case
>>>> number 1) and it also specifies the VLAN bridge spanning-tree protocol
to
>>>> run in this bridge group. *
>>>>
>>>>
>>>>
>>>> SW3(config)#*bridge 1 protocol vlan-bridge*
>>>>
>>>>
>>>>
>>>> *The following configuration assigns the bridge group that was created
>>>> with the Bridge 1 protocol vlan-bridge global configuration command to
>>>> interface VLAN 20 and 30.*
>>>>
>>>>
>>>>
>>>> SW3(config)#int vlan 20
>>>>
>>>> SW3(config-if)#*bridge-group 1*
>>>>
>>>>
>>>>
>>>> SW3(config-if)#int vlan 30
>>>>
>>>> SW3(config-if)#*bridge-group 1*
>>>>
>>>>
>>>>
>>>> *To verify the configuration*
>>>>
>>>> * *
>>>>
>>>> *On SW3*
>>>>
>>>> * *
>>>>
>>>> *If the output of your Show bridge command does NOT reveal the MAC
>>>> address of BB2 and BB3, you should generate some traffic (For example:
>>>> Pinging BB3 from BB2 using the IPv6 or IPX) so the bridge will see the
MAC
>>>> addresses.*
>>>>
>>>>
>>>>
>>>> *SW3#Show bridge*
>>>>
>>>>
>>>>
>>>> Br Group Mac Address State Type Ports
>>>>
>>>> -------- ----------------- ------- ------
>>>> ------
>>>>
>>>> 1 0000.2222.2222 *Forward DYNAMIC * Vl20 Fa0/12
>>>>
>>>> 1 0000.3333.3333 *Forward DYNAMIC* Vl30 Fa0/13
>>>>
>>>>
>>>>
>>>> *To test the configuration:*
>>>>
>>>> * *
>>>>
>>>> *On BB2*
>>>>
>>>>
>>>>
>>>> *BB2#Ping 23::3*
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte ICMP Echos to 23::3, timeout is 2 seconds:
>>>>
>>>> *!!!!!*
>>>>
>>>> *Success rate is 100 percent (5/5),* round-trip min/avg/max = 0/0/4 ms
>>>>
>>>>
>>>>
>>>> *BB2#Ping IPX ABCD.0000.3333.3333*
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte IPX Novell Echoes to ABCD.0000.3333.3333, timeout is
>>>> 2 seconds:
>>>>
>>>> *!!!!!*
>>>>
>>>> *Success rate is 100 percent (5/5),* round-trip min/avg/max = 1/2/4 ms
>>>>
>>>>
>>>>
>>>> *Note IPv6 and IPX pings worked.*
>>>>
>>>> * *
>>>>
>>>> * *
>>>>
>>>> *Task 2*
>>>>
>>>> * *
>>>>
>>>> Configure the switch such that ONLY static entries are bridged, if this
>>>> switch is configured properly, the switch should NOT bridge dynamically
>>>> learnt Mac addresses.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *On SW3*
>>>>
>>>>
>>>>
>>>> *In the previous task, the switch (SW3) learned the MAC addresses
>>>> dynamically, and it bridged the traffic between the VLANs. The following
>>>> command prevents the switch to forward frames to stations that it has
>>>> learned dynamically. *
>>>>
>>>>
>>>>
>>>> SW3(config)#*no bridge 1 acquire*
>>>>
>>>>
>>>>
>>>> * *
>>>>
>>>> *To verify the configuration:*
>>>>
>>>> * *
>>>>
>>>> *Note the output of the following Show command reveals that the
>>>> dynamically learned MAC addresses are discarded:*
>>>>
>>>> * *
>>>>
>>>> *On SW3*
>>>>
>>>>
>>>>
>>>> *SW3#Show bridge*
>>>>
>>>>
>>>>
>>>> Br Group Mac Address State Type Ports
>>>>
>>>> -------- ----------------- ------- ------
>>>> ------
>>>>
>>>> 1 0000.2222.2222 *discard DYNAMIC * Vl20
>>>> Fa0/12
>>>>
>>>> 1 0000.3333.3333 *discard DYNAMIC* Vl30
>>>> Fa0/13
>>>>
>>>>
>>>>
>>>> *To test the configuration:*
>>>>
>>>> * *
>>>>
>>>> *On BB2*
>>>>
>>>>
>>>>
>>>> *BB2#Ping IPX ABCD.0000.3333.3333*
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte IPX Novell Echoes to ABCD.0000.3333.3333, timeout is
>>>> 2 seconds:
>>>>
>>>> *.....*
>>>>
>>>> *Success rate is 0 percent (0/5)*
>>>>
>>>>
>>>>
>>>> *BB2#Ping 23::3 *
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte ICMP Echos to 23::3, timeout is 2 seconds:
>>>>
>>>> *.....*
>>>>
>>>> *Success rate is 0 percent (0/5)*
>>>>
>>>>
>>>>
>>>> *To complete the configuration:*
>>>>
>>>> * *
>>>>
>>>> *The following two commands add the MAC addresses of BB2 and BB3
>>>> statically, therefore, since the traffic from dynamically learned MAC
>>>> addresses are discarded, the traffic with statically configured MAC
>>>> addresses will be forwarded.*
>>>>
>>>> * *
>>>>
>>>> *On SW3*
>>>>
>>>>
>>>>
>>>> SW3(config)#*Bridge 1 address 0000.2222.2222 forward*
>>>>
>>>> SW3(config)#*Bridge 1 address 0000.3333.3333 forward*
>>>>
>>>>
>>>>
>>>> *To verify the configuration:*
>>>>
>>>> * *
>>>>
>>>> *On BB2*
>>>>
>>>>
>>>>
>>>> *SW3#Show bridge*
>>>>
>>>>
>>>>
>>>> Br Group Mac Address State Type Ports
>>>>
>>>> -------- ----------------- ------- ------
>>>> ------
>>>>
>>>> 1 0000.2222.2222 *Forward Static * -
>>>>
>>>> 1 0000.3333.3333 *Forward Static* -
>>>>
>>>> * *
>>>>
>>>> *To test the configuration:*
>>>>
>>>> * *
>>>>
>>>> *BB2#Ping 23::3*
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte ICMP Echos to 23::3, timeout is 2 seconds:
>>>>
>>>> *!!!!!*
>>>>
>>>> *Success rate is 100 percent (5/5),* round-trip min/avg/max = 0/1/4 ms
>>>>
>>>>
>>>>
>>>> *BB2#Ping IPX ABCD.0000.3333.3333*
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte IPX Novell Echoes to ABCD.0000.3333.3333, timeout is
>>>> 2 seconds:
>>>>
>>>> *!!!!!*
>>>>
>>>> *Success rate is 100 percent (5/5),* round-trip min/avg/max = 1/2/4 ms
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *Task 3*
>>>>
>>>> * *
>>>>
>>>> Configure the appropriate switch such that routers BB2 and BB3 can
>>>> forward NON-IP traffic between VLAN 20 and 30; you should configure
Fallback
>>>> Bridging to accomplish this task. If this task is configured properly,
you
>>>> should be able to use Ping to test this configuration using IPX
addressing
>>>> identified in the addressing chart. *IPv6 addressing should NOT work*when
conducting tests using the Ping command.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *Note because 3560 switches support IPv6, they do not consider IPv6 as
>>>> NON-IP traffic; therefore, they do not bridge IPv6 traffic.*
>>>>
>>>>
>>>>
>>>> *On BB2*
>>>>
>>>>
>>>>
>>>> BB2(config)#default interface f0/1
>>>>
>>>>
>>>>
>>>> BB2(config)#int f0/0
>>>>
>>>> BB2(config-if)#mac-address 000.2222.2222
>>>>
>>>>
>>>>
>>>> BB2(config-if)#ipx Network ABCD
>>>>
>>>> BB2(config-if)#ipv6 address 23::2/64
>>>>
>>>> BB2(config-if)#no shut
>>>>
>>>>
>>>>
>>>> *On BB3*
>>>>
>>>>
>>>>
>>>> BB3(config)#default interface f0/1
>>>>
>>>>
>>>>
>>>> BB3(config)#int f0/0
>>>>
>>>> BB3(config-if)#mac-address 0000.3333.3333
>>>>
>>>> BB3(config-if)#ipx Network ABCD
>>>>
>>>> BB3(config-if)#ipv6 address 23::3/64
>>>>
>>>> BB3(config-if)#no shut
>>>>
>>>>
>>>>
>>>> *On SW1*
>>>>
>>>>
>>>>
>>>> SW1(config)#int f0/10
>>>>
>>>> SW1(config-if)#swi mode acc
>>>>
>>>> SW1(config-if)#swi acc v 20
>>>>
>>>>
>>>>
>>>> SW1(config-if)#int f0/11
>>>>
>>>> SW1(config-if)#swi mode acc
>>>>
>>>> SW1(config-if)#swi acc v 30
>>>>
>>>>
>>>>
>>>> SW1(config)#int vlan 20
>>>>
>>>> SW1(config-if)#bridge-group 1
>>>>
>>>>
>>>>
>>>> SW1(config-if)#int vlan 30
>>>>
>>>> SW1(config-if)#bridge-group 1
>>>>
>>>>
>>>>
>>>> SW1(config)#Bridge 1 protocol vlan-bridge
>>>>
>>>>
>>>>
>>>> *To verify the configuration:*
>>>>
>>>> * *
>>>>
>>>> *On SW1*
>>>>
>>>>
>>>>
>>>> *SW3#Show bridge*
>>>>
>>>>
>>>>
>>>> Br Group Mac Address State Type Ports
>>>>
>>>> -------- ----------------- ------- ------
>>>> ------
>>>>
>>>> 1 0000.2222.2222 *Forward DYNAMIC * Vl20
>>>>
>>>> 1 0000.3333.3333 *Forward DYNAMIC* Vl30
>>>>
>>>>
>>>>
>>>> *To test the configuration:*
>>>>
>>>> * *
>>>>
>>>> *On SW1*
>>>>
>>>>
>>>>
>>>> *BB2#Ping 23::3*
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte ICMP Echos to 23::3, timeout is 2 seconds:
>>>>
>>>> *.....*
>>>>
>>>> *Success rate is 0 percent (0/5)*
>>>>
>>>>
>>>>
>>>> *Note the above Ping failed but the following Ping worked.*
>>>>
>>>>
>>>>
>>>> *BB2#Ping ipx ABCD.0000.3333.3333*
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte IPX Novell Echoes to ABCD.0000.3333.3333, timeout is
>>>> 2 seconds:
>>>>
>>>> *!!!!!*
>>>>
>>>> *Success rate is 100 percent (5/5),* round-trip min/avg/max = 1/2/4 ms
>>>>
>>>> * *
>>>>
>>>> *Note IPX pings worked, whereas, IPv6 pings did not work.*
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *Task 5*
>>>>
>>>>
>>>>
>>>> Configure R1 based on the following; this router should have
>>>> reachability to the other two routers
>>>>
>>>> R1, FastEthernet:
>>>>
>>>> IPX Net address = ABCD, IPv6 address = 23::1 /64, VLAN = Default,
>>>> MAC-address = 0000.1111.1111
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *On R1*
>>>>
>>>>
>>>>
>>>> R1(config)#ipx routing
>>>>
>>>>
>>>>
>>>> R1(config)#int f0/0
>>>>
>>>> R1(config-if)#mac-address 0000.1111.1111
>>>>
>>>> R1(config-if)#ipx Network ABCD
>>>>
>>>> R1(config-if)#ipv6 address 23::1/64
>>>>
>>>> R1(config-if)#no shut
>>>>
>>>>
>>>>
>>>> *On SW1*
>>>>
>>>> * *
>>>>
>>>> SW1(config)#interface f0/0
>>>>
>>>> SW1(config-if)#no Shut
>>>>
>>>>
>>>>
>>>> SW1(config)#int vlan 1
>>>>
>>>> SW1(config-if)#bridge-group 1
>>>>
>>>> SW1(config-if)#no shut
>>>>
>>>> * *
>>>>
>>>> *To test the configuration:*
>>>>
>>>> * *
>>>>
>>>> *On R1*
>>>>
>>>>
>>>>
>>>> *R1#ping ipx abcd.0000.2222.2222*
>>>>
>>>>
>>>>
>>>> Type escape sequence to abort.
>>>>
>>>> Sending 5, 100-byte IPX Novell Echoes to ABCD.0000.2222.2222, timeout is
>>>> 2 seconds:
>>>>
>>>> *!!!!!*
>>>>
>>>> *Success rate is 100 percent (5/5),* round-trip min/avg/max = 1/1/4 ms
>>>>
>>>> * *
>>>>
>>>> *To verify the configuration:*
>>>>
>>>> * *
>>>>
>>>> *On SW1*
>>>>
>>>>
>>>>
>>>> *SW1#Show bridge*
>>>>
>>>>
>>>>
>>>> Br Group Mac Address State Type Ports
>>>>
>>>> -------- ----------------- ------- ------
>>>> ------
>>>>
>>>> 1 0000.1111.1111 *Forward DYNAMIC* Vl1
>>>>
>>>> 1 0000.2222.2222 *Forward DYNAMIC * Vl20
>>>>
>>>> 1 0000.3333.3333 *Forward DYNAMIC* Vl30
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> * *
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On Fri, Feb 27, 2009 at 3:37 AM, mahmoud genidy <
>>>> ccie.mahmoud@gmail.com> wrote:
>>>>
>>>>> Hi GS,
>>>>>
>>>>> Any body know how you can statically deny or forward specific MAC
>>>>> addresses
>>>>> through a bridge? Also how to disable the dynamic learning of the MAC
>>>>> addresses on the bridge?
>>>>>
>>>>> I used what the DOC CD says and it is not working with me. To disable
>>>>> dynamic mac learning we have to use NO BRIDGE 1 ACQUIRE command. I used
>>>>> it
>>>>> and I still can see the dynamic MAC on the bridge group I have
>>>>> configured.
>>>>> Also I used Bridge forward and discard commands but also doesn't work.
>>>>> Here
>>>>> is my config:
>>>>>
>>>>> {
>>>>> bridge 1 protocol vlan-bridge
>>>>> no bridge 1 acquire
>>>>> bridge 1 address 1234.1234.1234 forward
>>>>> bridge 1 address 9876.9876.9876 discard
>>>>>
>>>>> interface Vlan13
>>>>> ip address 51.51.10.7 255.255.255.0
>>>>> bridge-group 1
>>>>> !
>>>>> interface FastEthernet0/12
>>>>> no switchport
>>>>> no ip address
>>>>> bridge-group 1
>>>>> !
>>>>> }
>>>>>
>>>>> Any hidden fact or concept here?
>>>>>
>>>>> Thanks
>>>>> M Genidy
>>>>>
>>>>> On Fri, Feb 27, 2009 at 3:50 PM, Nitro Drops <nitrodrops@hotmail.com>
>>>>> wrote:
>>>>>
>>>>> > Hi All,
>>>>> >
>>>>> > Like to hijack this thread. Was practising Fallback Bridging
>>>>> yesterday,
>>>>> > encountered this issue.
>>>>> >
>>>>> > IPv4 : R6 G0/1 (106.0.0.6) >> (106.0.0.10) F1/6 SW4 F1/4 (vlan104
>>>>> > 104.0.0.10)
>>>>> > >> (104.0.0.4)F0/1 R4
>>>>> > IPv6 : R6 G0/1 (2001::6/64) >> F1/6 SW4 F1/4 >> (2001::4/64)F0/1 R4
>>>>> >
>>>>> > IPv6 is setup to test on the fallback bridging
>>>>> > After i enabled Fallback Bridging on the 'int vlan104' & 'f0/6' of
>>>>> SW4. My
>>>>> > results are as follows
>>>>> >
>>>>> >
>>>>> >
>>>>> > 1.) R4 F0/1 (ipv6 - 2001::4/64) is able to ping/trace R6 F0/1 (ipv6 -
>>>>> > 2001::6/64)
>>>>> > 2.) R4 F0/1 (ipv4 - 106.0.0.6) is NOT able to ping/trace R6 F0/1
>>>>> (ipv4 -
>>>>> > 104.0.0.4). if i remove bridging on SW4, R4 F0/1 (ipv4) is ABLE to
>>>>> > ping/trace
>>>>> > R6 F0/1 (ipv4)
>>>>> >
>>>>> >
>>>>> >
>>>>> > I am using Dynamips running - (C3725-ADVENTERPRISEK9-M)
>>>>> >
>>>>> > For my troubleshooting, i did
>>>>> >
>>>>> > - sh ip routes on R4 and R6, i can see the RIP routes on both routers
>>>>> >
>>>>> > - did 'debug ip packet' & 'debug ip routing', when i tried to ping
>>>>> from R4
>>>>> > to
>>>>> > R6, i dont see any packets hitting SW4.
>>>>> >
>>>>> > My understanding of Fallback bridging, it bridges non-routed protocol
>>>>> > between SVIs and L3 routed interfaces. So i assum routed protocol
>>>>> will
>>>>> > remain as routable?
>>>>> >
>>>>> > Any kind advises?
>>>>> >
>>>>> >
>>>>> >
>>>>> > Cheers
>>>>> >
>>>>> > Nit
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>> > > Date: Fri, 20 Feb 2009 05:03:01 +0000
>>>>> > > From: joe_astorino@comcast.net
>>>>> > > To: joe_astorino@comcast.net
>>>>> > > CC: ccielab@groupstudy.com; raghavbhargava12@gmail.com
>>>>> > > Subject: Re: Fallback Bridging
>>>>> > >
>>>>> > > Let me rephrase what I said in my most recent post. Suppose ports
>>>>> 1-5 AND
>>>>> > ports 6-10 are running the SAME non-IP protocol and they want to talk
>>>>> but
>>>>> > are
>>>>> > in different VLANs. The switch can not route between the 2 VLANs if
>>>>> it is
>>>>> > not
>>>>> > IP. Thus, you bridge them. What I said before about appletalk
>>>>> communicating
>>>>> > with DECNET I don't think made any sense :)
>>>>> > >
>>>>> > > - Joe
>>>>> > > ----- Original Message -----
>>>>> > > From: "joe astorino" <joe_astorino@comcast.net>
>>>>> > > To: "Raghav Bhargava" <raghavbhargava12@gmail.com>
>>>>> > > Cc: "Cisco certification" <ccielab@groupstudy.com>
>>>>> > > Sent: Thursday, February 19, 2009 11:44:14 PM GMT -05:00 US/Canada
>>>>> > Eastern
>>>>> > > Subject: Re: Fallback Bridging
>>>>> > >
>>>>> > > Raghav,
>>>>> > >
>>>>> > > The way I understand it is this -- VLANs in general, and thus
>>>>> inter-vlan
>>>>> > routing on a switch were designed around the IP protocol. Fallback
>>>>> bridging
>>>>> > basically allows you to bridge non-ip protocols between VLANs. Since
>>>>> it is
>>>>> > not
>>>>> > IP it cannot be routed normally like an IP packet between vlans, so
>>>>> it can
>>>>> > be
>>>>> > bridged. I hope that helps
>>>>> > >
>>>>> > > - Joe
>>>>> > > ----- Original Message -----
>>>>> > > From: "Raghav Bhargava" <raghavbhargava12@gmail.com>
>>>>> > > To: "Cisco certification" <ccielab@groupstudy.com>
>>>>> > > Sent: Thursday, February 19, 2009 11:27:03 PM GMT -05:00 US/Canada
>>>>> > Eastern
>>>>> > > Subject: Fallback Bridging
>>>>> > >
>>>>> > > Hi Experts,
>>>>> > >
>>>>> > > I was reading Fallback Bridging but somehow could not understand
>>>>> it.
>>>>> > > Can someone please explain in simple terms.
>>>>> > >
>>>>> > > Appreciate all the help..
>>>>> > >
>>>>> > > --
>>>>> > > Warm Regards
>>>>> > > Raghav
>>>>> > >
>>>>> > >
>>>>> > > Blogs and organic groups at http://www.ccie.net
>>>>> > >
>>>>> > >
>>>>> _______________________________________________________________________
>>>>> > > Subscription information may be found at:
>>>>> > > http://www.groupstudy.com/list/CCIELab.html
>>>>> > >
>>>>> > >
>>>>> > > Blogs and organic groups at http://www.ccie.net
>>>>> > >
>>>>> > >
>>>>> _______________________________________________________________________
>>>>> > > Subscription information may be found at:
>>>>> > > http://www.groupstudy.com/list/CCIELab.html
>>>>> > >
>>>>> > >
>>>>> > > Blogs and organic groups at http://www.ccie.net
>>>>> > >
>>>>> > >
>>>>> _______________________________________________________________________
>>>>> > > Subscription information may be found at:
>>>>> > > http://www.groupstudy.com/list/CCIELab.html
>>>>> > >
>>>>> > >
>>>>> > >
>>>>> > >
>>>>> > >
>>>>> > >
>>>>> > >
>>>>> >
>>>>> > _________________________________________________________________
>>>>> > It's simple! Sell your car for just $50
>>>>> >
>>>>> >
>>>>>
http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fsecure%2Dau%2Eimrworldwide%2E
>>>>> >
>>>>> >
>>>>>
com%2Fcgi%2Dbin%2Fa%2Fci%5F450304%2Fet%5F2%2Fcg%5F801459%2Fpi%5F1004813%2Fai%
<
>>>>>
http://a.ninemsn.com.au/b.aspx?URL=http%3A%2F%2Fsecure%2Dau%2Eimrworldwide%2E
%0Acom%2Fcgi%2Dbin%2Fa%2Fci%5F450304%2Fet%5F2%2Fcg%5F801459%2Fpi%5F1004813%2F
ai%>
>>>>>
>>>>> > 5F859641&_t=762955845&_r=tig_OCT07&_m=EXT
>>>>> >
>>>>> >
>>>>> > Blogs and organic groups at http://www.ccie.net
>>>>> >
>>>>> >
>>>>> _______________________________________________________________________
>>>>> > Subscription information may be found at:
>>>>> > http://www.groupstudy.com/list/CCIELab.html
>>>>>
>>>>>
>>>>> Blogs and organic groups at http://www.ccie.net
>>>>>
>>>>> _______________________________________________________________________
>>>>> Subscription information may be found at:
>>>>> http://www.groupstudy.com/list/CCIELab.html
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Narbik Kocharians
>>>> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
>>>> www.MicronicsTraining.com <http://www.micronicstraining.com/>
>>>> www.Net-Workbooks.com <http://www.net-workbooks.com/>
>>>> Sr. Technical Instructor
>>>>
>>>
>>>
>>
>>
>> --
>> Narbik Kocharians
>> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
>> www.MicronicsTraining.com <http://www.micronicstraining.com/>
>> www.Net-Workbooks.com <http://www.net-workbooks.com/>
>> Sr. Technical Instructor
>>
>
>
-- Narbik Kocharians CCSI#30832, CCIE# 12410 (R&S, SP, Security) www.MicronicsTraining.com www.Net-Workbooks.com Sr. Technical InstructorBlogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Sun Mar 01 2009 - 09:44:13 ARST