Veritas-bu

[Veritas-bu] NetBackup Not Using Backup NIC

2011-03-17 22:08:09
Subject: [Veritas-bu] NetBackup Not Using Backup NIC
From: Crowey <netbackup-forum AT backupcentral DOT com>
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Date: Thu, 17 Mar 2011 19:07:59 -0700
Gidday, I'm trying to troubleshoot some really bad performance issues when 
writing to disc for NetBackup differentials, and as part of that process I 
noticed that NetBackup is not using the backup NIC I have configured on our 
main server.

Our main server has two NICs configured, eth0 on 172.20.10.23 and eth2 on 
172.20.10.24.  In DNS I have eth0's address resolving to server, and eth2's 
address resolving to server-backup.

I have NetBackup configured to connect to the address server-backup.  And in 
the Admin Console | Host Properties | Clients I can connect to the server - 
ostensibly via the configured DNS address of server-backup.

I can ping both addresses on the Master/Media NetBackup server as well as the 
server itself.  However if I do a ifconfig eth0/2 on the server in question I 
get this ...

  eth0      Link encap:Ethernet  HWaddr 00:14:4F:0D:82:92  
            inet addr:172.20.10.23  Bcast:172.20.10.255  Mask:255.255.255.0
            inet6 addr: fe80::214:4fff:fe0d:8292/64 Scope:Link
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
            RX packets:126134922 errors:0 dropped:0 overruns:0 frame:0
            TX packets:249411328 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000 
            RX bytes:46698652928 (43.4 GiB)  TX bytes:289231929457 (269.3 GiB)
            Base address:0x8800 Memory:85b80000-85ba0000 

  eth2      Link encap:Ethernet  HWaddr 00:14:4F:0D:7E:FA  
            inet addr:172.20.10.24  Bcast:172.20.10.255  Mask:255.255.255.0
            inet6 addr: fe80::214:4fff:fe0d:7efa/64 Scope:Link
            UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
            RX packets:197097 errors:0 dropped:0 overruns:0 frame:0
            TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000 
            RX bytes:92088745 (87.8 MiB)  TX bytes:782 (782.0 b)
            Base address:0xc800 Memory:b3d80000-b3da0000 

Clearly eth2 (server-backup) is receiving OK, but nothing is going back out.

Any ideas what I can do to resolve this? - I'm sure its probably something 
stupid, but I'd be grateful for any advice on this matter.

(I'm running RHEL AS 4.6 x86_64 by the way)

Cheers
John

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