Re: [Veritas-bu] NetBackup Not Using Backup NIC
2011-03-18 07:33:18
Both NICs are on the same IP segment.
addr:172.20.10.23 Mask:255.255.255.0
addr:172.20.10.24 Mask:255.255.255.0
As far as the OS is concerned they are on the same dedicated segments with
equal weight (Metric:1) in the routing table and probably binding to eth0
first. Run bpclntcmd -self to see which interface(s) NBU thinks it is using. My
guess is both will show up.
REQUIRED_INTERFACE only works for outbound TCP SYN requests sent from the
server. If you are backing up using both interfaces then REQUIRED_INTERFACE is
not an option. If only using the eth2 then try this-
REQUIRED_INTERFACE = server-backup.
Otherwise to try using static host routes to force the OS to pick eth2 over
eth0 depending on which IP segment the clients are on if you want your backups
to use that interface.
Dan O
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Crowey
Sent: Thursday, March 17, 2011 9:08 PM
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: [Veritas-bu] NetBackup Not Using Backup NIC
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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