Solved: 7600 MAC addresses

lamav · ‎09-18-2009

How come every interface on this 7600 has the same MAC address?

A 'sh mod' shows the ranges of addresses available, yet I only see one being used for every physical and virtual interface...

What gives?

Thanks

Victor

R3#sh mod

Mod Ports Card Type Model Serial No.

--- ----- -------------------------------------- ------------------ -----------

1 48 CEF720 48 port 1000mb SFP WS-X6748-SFP SAL1303GJRT

5 2 Route Switch Processor 720 (Active) RSP720-3CXL-GE JAE13125UWR

6 2 Route Switch Processor 720 (Hot) RSP720-3CXL-GE JAE131159FJ

9 4 7600 ES+ 7600-ES+4TG3CXL JAE13136DRM

<b>Mod MAC addresses Hw Fw Sw Status

--- ---------------------------------- ------ ------------ ------------ -------

1 0024.14d7.df40 to 0024.14d7.df6f 1.12 12.2(14r)S5 12.2(33)SRD1 Ok

5 001c.584c.ddd0 to 001c.584c.ddd3 5.7 12.2(33r)SRD 12.2(33)SRD1 Ok

6 001c.584c.d1a8 to 001c.584c.d1ab 5.7 12.2(33r)SRD 12.2(33)SRD1 Ok

9 0024.f94c.cd30 to 0024.f94c.cd3f 1.0 12.2(33r)SRD 12.2(33)SRD1 Ok</b>

Mod Sub-Module Model Serial Hw Status

---- --------------------------- ------------------ ----------- ------- -------

1 Distributed Forwarding Card WS-F6700-DFC3CXL SAL1310LCPA 1.3 Ok

5 Policy Feature Card 3 7600-PFC3CXL JAE13115DVP 1.1 Ok

5 C7600 MSFC4 Daughterboard 7600-MSFC4 JAE13125PU9 1.1 Ok

6 Policy Feature Card 3 7600-PFC3CXL JAE13115I5K 1.1 Ok

6 C7600 MSFC4 Daughterboard 7600-MSFC4 JAE13115ID5 1.1 Ok

9 7600 ES+ DFC XL 7600-ES+3CXL JAE13115KOC 1.0 Ok

9 7600 ES+ 4x10GE XFP 7600-ES+4TG JAE13125TER 1.0 Ok

R3#sh int | in address is

Hardware is C7600 1Gb 802.3, address is 0024.144b.0b40 (bia 0024.144b.0b40)

R3#

Edison Ortiz · ‎09-18-2009

I want to correct my previous statement, the burned-in MAC address is obtained from the chassis, not the PFC.

http://www.cisco.com/en/US/docs/ios/fundamentals/command/reference/cf_s1.html#wp1026805

View solution in original post

Edison Ortiz · ‎09-18-2009

It uses the same concept as the 6500. If the interface is set to L3 mode, it will use the PFC mac-address, if the interface is set to L2 mode, it will use an unique mac-address.

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801c9b4e.shtml#l2_mac

Router#sh int | in address is

Hardware is EtherSVI, address is 0009.44d0.5400 (bia 0009.44d0.5400)

Hardware is C6k 1000Mb 802.3, address is 0009.44d0.5400 (bia 0009.44d0.5400)

Hardware is C6k 10000Mb 802.3, address is 0009.44d0.5400 (bia 0009.44d0.5400)

Router#sh int f9/1

FastEthernet9/1 is down, line protocol is down (notconnect)

Hardware is C6k 100Mb 802.3, address is 0009.44d0.5400 (bia 0009.44d0.5400)

Router(config)#int f9/1

Router(config-if)#sw

Router(config-if)#switchport

Router(config-if)#end

Router#sh int f9/1

FastEthernet9/1 is down, line protocol is down (notconnect)

Hardware is C6k 100Mb 802.3, address is 0001.63d4.c42a (bia 0001.63d4.c42a)

lamav · ‎09-18-2009

Ah, OK..forgot about that...

Quick follow-up...

I changed gi1/10 to a L2 port, and the MAC indeed changed to the 10th address in the MAC address range for that module, according to the sh mo outout.

But the MAC it shows when its a l3 interface is not the PFC card in slot 5 (active RSP). Or is it? If it is, it doesnt show in the range shown by the sh mod output.

R3#sh int gi1/9

GigabitEthernet1/9 is administratively down, line protocol is down (disabled)

Hardware is C7600 1Gb 802.3, address is 0024.144b.0b40 (bia 0024.144b.0b40)

MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

R3# sh mod | in 5

5 001c.584c.ddd0 to 001c.584c.ddd3 5.7 12.2(33r)SRD 12.2(33)SRD1 Ok

Thanks, Edison

Edison Ortiz · ‎09-18-2009

I want to correct my previous statement, the burned-in MAC address is obtained from the chassis, not the PFC.

http://www.cisco.com/en/US/docs/ios/fundamentals/command/reference/cf_s1.html#wp1026805

lamav · ‎09-18-2009

Ok, cool.

Thanks. Appreciate the help, as always.

Victor