ServiceGuard Standby LAN

[Fernando Boza]

I have 2 rp7410 in cluster with hp-ux 11.11
The cluster config is:


NODE_NAME nodo1
NETWORK_INTERFACE lan1
STATIONARY_IP 182.17.2.105
NETWORK_INTERFACE lan2
NETWORK_INTERFACE lan3
HEARTBEAT_IP 192.168.1.1
NETWORK_INTERFACE lan0

FIRST_CLUSTER_LOCK_PV /dev/dsk/c10t0d7
SECOND_CLUSTER_LOCK_PV /dev/dsk/c10t1d0

# List of serial device file names
# For example:
# SERIAL_DEVICE_FILE /dev/tty0p0

# Possible standby Network Interfaces for lan1,lan2: lan0,lan3.

NODE_NAME nodo2
NETWORK_INTERFACE lan1
STATIONARY_IP 182.17.2.12
NETWORK_INTERFACE lan2
NETWORK_INTERFACE lan3
HEARTBEAT_IP 192.168.1.2
NETWORK_INTERFACE lan0

FIRST_CLUSTER_LOCK_PV /dev/dsk/c14t0d7
SECOND_CLUSTER_LOCK_PV /dev/dsk/c14t1d0



What is standby LAN for lan1? and
what is standby LAN for lan3?

[Bob_Vance · Accepted solution]

A LAN that does *not* have an IP assigned (Stationary or Heartbeat)
will be a standby for any LAN that is on the same bridged network (basically, attached to the same set of switches).

So, it depends on how things are connected.

LAN2 and LAN0 could both be standby for either LAN1 and/or LAN3.


To see which LANS are bridged together:

## cmquerycl -c CL_banner -l net



bv

[Fernando Boza]

Thanks Bob

What hapend if the LAN1 is 1GB/s and LAN2 is 100MB/s
LAN2 functions as standby of LAN1?

[Bob_Vance]

Speed shouldn't matter for standby to work.
If SG query doesn't complain then it will work.

Clearly, it would be much better to have
1G STATIONARY primary for public access of clients
1G standby

and 100M Heartbeat
with 100M standby.


What was your output from

## cmquerycl -c CL_banner -l net

?


Also, this will show actual, running LAN setup:

## cmviewcl -v | grep -e INTER -e lan -e '^ [^ ]'

NODE STATUS STATE
Pine2 up running
INTERFACE STATUS PATH NAME
PRIMARY up 0/1/2/0 lan0
STANDBY up 0/6/1/0 lan1
NODE STATUS STATE
Lilly2 up running
INTERFACE STATUS PATH NAME
PRIMARY up 0/1/2/0 lan0
STANDBY up 0/6/1/0 lan1


bv

[Michael Steele_2]

Use the MC/ServiceGuard command cmscancl.

cmscancl -n node -o outfile

Get use to use this command. Its a very valuable diagnostic utility that includes a lan connection section with exactly what you're looking for:

STANDBY lan1
CONNECTED lan 1
NOT CONNECTED lan 2

Additionally, all connections are at the MAC address level. So use 'arp -a' to review.