DLSw Ethernet Redundancy - Issue !?

Unanswered Question
Aug 3rd, 2009
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Dear All Expert,


Good day.

Currently, i have a issue of the DLsw ER+ and i hope that DLSw+ Netpro Experts can highlight/advice my problem.


Problem Description:

Please refer the diagram - dlsw+.jpg first.


Early, my network did configure the #bridge-group 1 in both Fast-Ethernet of Router A and B, but it suffer the common dlsw issue

•Unreliable Local Reachability Information

•Circuit Contention

•Undetected Looping Explorers


After removing one #bridge-group 1 from Router B Fast-Ethernet, the network become stable already.


Now i still look for the DLsw Ethernet redundancy solution (Purpose = Router A as primary and Router B will take over role A


in case Router A down), and do some research.

~~~~~~~~~~~~~~~~~~~~~~~

URL 1 - http://www.networkingunlimited.com/white003.html

URL 2 - http://www.cisco.com/en/US/docs/ios/12_0t/12_0t5/feature/guide/ethredu.html

URL 3 - http://www.cisco.com/en/US/tech/tk331/tk336/technologies_configuration_example09186a0080093ecc.shtml

~~~~~~~~~~~~~~~~~~~~~~~

But, it look like my problem more suitable to use cisco solution << URL 2 - Figure 6 DLSw+ with Ethernet Redundancy Enabled >>


Example from URL 2:

~~~~~~~~~~~~~~~~~~~~~~~~

Router B


dlsw local-peer peer id 10.2.24.2

dlsw remote-peer 0 tcp 10.2.17.1

int e1

ip address 150.150.2.1 255.255.255.0

dlsw transparent redundancy-enable 9999.9999.9999


Router A


dlsw local-peer peer-id 10.2.24.3

dlsw remote-peer 0 tcp 10.1.12.1

int e1

ip address 150.150.2.3 255.255.255.0

dlsw transparent redundancy-enable 9999.9999.9999 master priority 1

dlsw transparent timers sna 1500

~~~~~~~~~~~~~~~~~~~~~~~~


Now my concerns are


1. It is really suitable to use the URL2 solution ? or Dlsw passive and backup-peer are better ?


2. If using URL2 solution, is it following the multicast MAC-address 9999.9999.9999 ? How to choose the MAC address ?


3. Should i still put the #bridge-group 1 command into both Fast-Ethernet of Router A and B ? If still working without the #bridge-group 1 command ?


4. Just review the URL3, and it is more complicated. Because it has to configure each MAC-address in the Fast-Ethernet and #dlsw transparent Map. Is it neccessary to use #dlsw transparent map or the URL2 will do it as well.


FYI - the current dlsw config of router A and B

~~~~~~~~~~~~~~~~

dlsw local-peer peer-id 1.1.1.1

dlsw timer explorer-wait-time 3

dlsw timer explorer-delay-time 1

dlsw timer connect-timeout 600

dlsw timer local-connect-timeout 15

dlsw rsvp default

dlsw remote-peer 0 tcp 3.3.3.3 host-netbios-out XXX

dlsw remote-peer 0 tcp 4.4.4.4

dlsw remote-peer 0 tcp 5.5.5.5

dlsw bridge-group 1

dlsw circuit-keepalives


int fa0/0

bridge-group 1 (only in router A now)

~~~~~~~~~~~~~~~~~~


Please kindly help it.


Regards

Terry



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