Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | |||
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Solution Type Technical Instruction Sure Solution 1007566.1 : Sun Fire [TM] V480 local-mac-address behavior
PreviouslyPublishedAs 210471 Description Working with the Open Boot PROM (OBP) variable 'local-mac-address ' on the V480 platform. Steps to Follow The purpose of this document is to describe the behavior of the Open Boot PROM(OBP) variable 'local-mac-address ' on the V480 platform. Configuring this variable for specific network configurations is outside of the scope of this document.
There are two "built-in" network interfaces on the V480. The physical connections are labeled Net0 and Net1. The device paths for the interfaces are as follows: Net0 = /pci@9,700000/network@2 Net1 = /pci@9,600000/network@1 Net0 and Net1 are generally associated with ce0 (Cassini Ethernet) and ce1 respectively under Solaris[TM]. However this may not be a constant, whereas the specific hardware device path is a constant the mapping of device instance numbers under Solaris may change depending upon specific hardware and OBP configurations.
Solaris will assign the same mac address as reported by the OBP banner to each of the "ce" interfaces when the 'local_mac_address ' is set to false (default). This is the behavior seen in other multi-interfaced platforms.
When 'local_mac_address ' is set to 'true', Solaris assigns (or is assigned) the mac address associated with Net1 to "ce0" rather than from Net0. This results in a different mac address than what is displayed by the banner. This effective change occurs due to the order in which these interfaces are probed at the OBP level. This behavior may be different from other platforms where the primary interface maintains the OBP banner mac address regardless of the 'local-mac-address' setting.
To show this correlation below are examples of the OBP banner (1), a 'show-nets' output (2), how the entries are defined as instance numbers in /etc/path_to_inst file (3), and how Solaris associates the mac address with 'local_mac_address ' set to false (4) and when set to true (5).
1) OBP banner output: {2} ok banner Sun Fire [TM] 480R, No Keyboard Copyright 1998-2002 Sun Microsystems, Inc. All rights reserved. OpenBoot 4.5, 4096 MB memory installed, Serial #51038073. Ethernet address 0:3:ba:a:c7:79, Host ID: 830ac779. 2) 'show-nets' output {2} ok show-nets a) /pci@9,600000/network@1 b) /pci@9,700000/network@2 3) Network entries in /etc/path_to_inst file "/pci@9,700000/network@2" 0 "ce" "/pci@9,600000/network@1" 1 "ce" 4) How Solaris associates the mac address with local-mac-address =false # ifconfig -a lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 ce0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 129.148.11.46 netmask ffffff00 broadcast 129.148.11.255 ether 0:3:ba:a:c7:79 ce1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3 inet 129.129.129.6 netmask ffff0000 broadcast 129.129.255.255 ether 0:3:ba:a:c7:79 5) How Solaris associates the mac address with local-mac-address =true # ifconfig -a lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 ce0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 129.148.11.46 netmask ffffff00 broadcast 129.148.11.255 ether 0:3:ba:a:c7:7a ce1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3 inet 129.129.129.6 netmask ffff0000 broadcast 129.129.255.255 ether 0:3:ba:a:c7:79 Product Sun Fire V480 Server Internal Comments The properties associated with each interface can be examined from the OBP as follows (see explanation below): {2} ok setenv auto-boot false auto-boot = false {2} ok reset-all Resetting ... Sun Fire 480R, No Keyboard Copyright 1998-2002 Sun Microsystems, Inc. All rights reserved. OpenBoot 4.5, 4096 MB memory installed, Serial #51038073. Ethernet address 0:3:ba:a:c7:79, Host ID: 830ac779. {2} ok show-nets a) /pci@9,600000/network@1 b) /pci@9,700000/network@2 q) NO SELECTION Enter Selection, q to quit: b ======> Net0 is selected /pci@9,700000/network@2 has been selected. Type ^Y ( Control-Y ) to insert it in the command line. e.g. ok nvalias mydev ^Y for creating devalias mydev for /pci@9,700000/network@2 {2} ok select /pci@9,700000/network@2 ======> this is Net0 device path 100 Mbps HDX Link up {2} ok .prp ======> Display the properties mac-address 00 03 ba 0a c7 79 assigned-addresses 82001010 00000000 00200000 00000000 00200000 82001030 00000000 02000000 00000000 00100000 pci-req-removal compatible 70 63 69 31 30 38 65 2c 61 62 62 61 2e 31 31 00 reg 00001000 00000000 00000000 00000000 00000000 02001010 00000000 00000000 00000000 00200000 version Gigaswift FCode 2.7 02/01/31 address-bits 00 00 00 30 max-frame-size 00 00 40 00 phy-type mif model SUNW,pci-ce device_type network name network local-mac-address 00 03 ba 0a c7 7a 66mhz-capable fast-back-to-back devsel-speed 00000002 class-code 00020000 interrupts 00000001 00000002 00000003 00000004 latency-timer 00000040 cache-line-size 00000010 max-latency 00000040 min-grant 00000040 revision-id 00000011 device-id 0000abba vendor-id 0000108e {2} ok The first line 'mac-address' shows the same address as in the the system MAC address. The line for 'local-mac-address' shows will be assigned to ce0 (always banner address + 1, 79 + 1 = 7a) local-mac-address is set to true.
{2} ok device-end Previously Published As 47437 Change History Date: 2003-05-20 User Name: Administrator Action: Migration from KMSCreator Comment: updated by : Paul Buckley comment : making changes base on engineering feedback date : Oct 7, 2002 updated by : Paul Buckley comment : making changes base on engineering feedback date : Oct 7, 2002 Attachments This solution has no attachment |
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