2 ITG's both want to be Leader

[HUGWideBoy]

Strange fault

I have a option 11c 25.40b with 2 ITG's ver 2.1

In normal operation they work fine(1 leader, 1 backup leader)

but if I have a power failure to my elan, they both elect to be Leader. Then once power is restored to the elan...they both stay as leader.

I have to reset both card to get them back into normal operation.

Is there some way to get them to re-elect who is leader automatically?

Many thanks

Wide

 

[johnpoole]

your right it should do that without input, check your config and make sure the mac addresses are correct. the leader is elected by protocol similar to spanning tree, layer 2 mac address voting

john poole
bellsouth business
columbia,sc

 

[HUGWideBoy]

John,

Thanks I'll check the MAC's tommorow

Thanks

Wide

 

[HUGWideBoy]

Ok I found a soluction, so it's only fair that I post here.

Turns out the ITG 2 documentation had a error, this is from
"Appendix D: Corrections to ITG Trunk 2.0/ISL NTP"

I did this, then simulated a power failure. Everything worked fine and the ITG's initialised perfectly.

WideBoy


Correction #2
ITG Trunk 2.0 – Procedure correction for BackUp Leader
installation in ITG Trunk 2.0/ISDN NTP (Standard 1.00)
Procedure 5 describes the correct procedure for installing a Backup Leader
with ITG 2.0 cards.
Procedure 5
Install a BackUp Leader with ITG 2.0 cards
1 Ensure both cards are running the same version of software. This is
done by logging into the cards. The software version is displayed.
2 If the software versions are different, follow the upgrade erase
procedure. Download the software from

http://www.nortelnetworks.com

home page. If problems are encountered, please contact your support
group or GNTS.
3 Ensure the D-channel is configured to handle the extra B-channels
that are installed. ISLM = 382 max.
4 Use NTMF94 cables for ITG Trunk 2.0 cards with a D-CHIP card
installed. For ITG Trunk 2.0 cards which do not have a D-CHIP card
installed, use NTCW84 cables.
5 In MAT/OTM, in the same Node as Leader 0, configure Leader 1.
Ensure the correct MAC/Management and voice addresses assigned
for the backup leader are used, and add them. The Management
addresses must be on the same subnet for all cards. Though on a
different subnet than the management addresses, voice addresses
must also be on the same subnet. The MAC address used must
always be for the motherboard and is printed on the front of the card.
Page 42 of 42 Appendix D: Corrections to ITG Trunk 2.0/ISL NTP
P0941862 Standard 2.00 March 2002
6 If the card (Leader1) has been configured previously, perform the
Clear Leader command at the ITG interface. This reboots the card as
a follower/BLDR. It is not necessary to use the SET LEADER
command at any time.
7 Disable Leader 0 and Leader 1 from the Meridian interface. Disable the
card in the software to ensure it is disabled, even if the LED on the card
is lit.
8 From MAT/OTM, transmit the NODE/CARD/Dialling Plan to the active
leader and all disabled cards. This action is successful to Leader 0, but
fails to Leader 1, as Leader 1 does not yet have an IP address.
9 Remove Leader 1 from the M1 backplane.
10 Reboot Leader 0.
11 When Leader 0 is fully rebooted, push Leader 1 back into position.
12 Leader 1 sends a BootP request to Leader 0. Leader 0 then sends a
message back to Leader 1 which containing Leader 1’s IP address.
Leader 1 reboots itself. Leader 1 then comes back as a BLDR.
Depending on the network and configuration, Leader 1 can reboot
itself up to 3 times.
13 Enable the Leader 0 in the M1 interface.
14 Transmit the Card/Dialling plan (not Node properties) to Leader 1 from
MAT or OTM. Reboot Leader 1 again.
15 When fully rebooted, enable Leader 1. If D-channel messaging is
enabled, all the channels associated with this card give a Restart
message.
16 All channels are IDLE on the LDR and BLDR in the system.
17 If both cards become the LDR, then a network problem has occurred,
as BLDR is not receiving/responding to a PING message. To verify,
connect the TLAN of both cards to a basic hub and reboot the card.
The card must be BLDR. The LDR pings from the Node IP address on
the TLAN to BLDR almost continuously. The Link light is continuously
lit on the front of the card. The traffic light blinks when the Ping
message is sent (with no other traffic active on the cards). The lights
on the front of an ITG card represent the state of the TLAN.
—————————— End of Procedure ——————————