Project

General

Profile

Actions
Copy link

Bug #2759

open

can not add a BMC with the same MAC address as the hosts boot IP

Added by Joshua Hoblitt almost 11 years ago. Updated almost 11 years ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
BMC
Target version:
-
Difficulty:
Triaged:
Bugzilla link:
Pull request:
Fixed in Releases:
Found in Releases:
Red Hat JIRA:

Description

On some [older/ancient] BMCs, the BMC shares the same MAC address as the host interface.

# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:1F:C6:16:0A:91  
          inet addr:140.252.6.20  Bcast:140.252.6.255  Mask:255.255.255.0
          inet6 addr: fe80::21f:c6ff:fe16:a91/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1071916861 errors:1 dropped:0 overruns:0 frame:1
          TX packets:210694687 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1210304125909 (1.1 TiB)  TX bytes:178033703764 (165.8 GiB)
          Base address:0x2000 Memory:c8200000-c8220000 

# ipmitool lan print 
Set in Progress         : Set Complete
Auth Type Support       : NONE MD2 MD5 PASSWORD 
Auth Type Enable        : Callback : NONE MD2 MD5 PASSWORD 
                        : User     : NONE MD2 MD5 PASSWORD 
                        : Operator : NONE MD2 MD5 PASSWORD 
                        : Admin    : NONE MD2 MD5 PASSWORD 
                        : OEM      : NONE MD2 MD5 PASSWORD 
IP Address Source       : Static Address
IP Address              : 140.252.26.96
Subnet Mask             : 255.255.255.0
MAC Address             : 00:1f:c6:16:0a:91
SNMP Community String   : public
IP Header               : TTL=0x40 Flags=0x40 Precedence=0x00 TOS=0x10
BMC ARP Control         : ARP Responses Enabled, Gratuitous ARP Disabled
Gratituous ARP Intrvl   : 2.0 seconds
Default Gateway IP      : 140.252.26.1
Default Gateway MAC     : 00:30:48:41:93:28
Backup Gateway IP       : 0.0.0.0
Backup Gateway MAC      : 00:00:00:00:00:00
802.1q VLAN ID          : Disabled
RMCP+ Cipher Suites     : 0,1,2,6,7
Cipher Suite Priv Max   : aaaXXXaaXXXXXXX
                        :     X=Cipher Suite Unused
                        :     c=CALLBACK
                        :     u=USER
                        :     o=OPERATOR
                        :     a=ADMIN
                        :     O=OEM

In 1.1, you can not add a BMC interface to a host as foreman complains that the mac address is already in use. I'm not sure if this issue is even worth fixing as I've only see this on very old systems but it may be worth noting the existence of this limitation.

Actions
Copy link
 #1

Updated by Dominic Cleal almost 11 years ago

  • Category set to BMC

Interesting.. I think this restriction could be more common, since many BMC systems support sharing of the host's primary network interface. Many users would usually have separate interfaces, but I think it's still valid.

Actions
Copy link

Also available in: Atom PDF