dCef on 6500 line cards

Answered Question
Mar 7th, 2008

I have the following in my 6509.

Mod Ports Card Type Model Serial No.

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

1 24 CEF720 24 port 1000mb SFP WS-X6724-SFP SAL2007DUVM

2 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAL28311C2M

3 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAL20425ER7

4 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX SAD29010DW6

6 2 Supervisor Engine 720 (Active) WS-SUP720-3B SAL2015JVRR

Mod MAC addresses Hw Fw Sw Status

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

1 0016.c7a1.6c04 to 0016.c7a1.6c1b 2.3 12.2(14r)S5 12.2(18)SXD7 Ok

2 0001.0002.0003 to 0001.0002.0032 2.0 12.2(14r)S5 12.2(18)SXD7 Ok

3 0019.56c3.ec80 to 0019.56c3.ecaf 2.5 12.2(14r)S5 12.2(18)SXD7 Ok

4 0011.bb2b.6590 to 0011.bb2b.65bf 2.5 12.2(14r)S5 12.2(18)SXD7 Ok

6 0017.5a35.00e0 to 0017.5a35.00e3 5.2 8.5(2) 12.2(18)SXD7 Ok

Mod Sub-Module Model Serial Hw Status

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

1 Centralized Forwarding Card WS-F6700-CFC SAL1051BPBD 3.1 Ok

2 Distributed Forwarding Card WS-F6700-DFC3B SAD0951031D 4.2 Ok

3 Distributed Forwarding Card WS-F6700-DFC3B SAL1006CXXM 4.2 Ok

4 Distributed Forwarding Card WS-F6700-DFC3B SAD0951030D 4.2 Ok

6 Policy Feature Card 3 WS-F6K-PFC3B SAL1015JMMM 2.3 Ok

6 MSFC3 Daughterboard WS-SUP720 SAL1015JMXX 2.6 Ok

Its states that distributed forwarding is enabled by default on 6500 but when I do:

#show cef interface gigabitEthernet 3/1

GigabitEthernet3/1 is up (if_number 272)

Corresponding hwidb fast_if_number 272

Corresponding hwidb firstsw->if_number 272

Internet Protocol processing disabled

Hardware idb is GigabitEthernet3/1 (272)

Software idb is GigabitEthernet3/1 (272)

Fast switching type 22, interface type 142

IP CEF switching enabled

IP Fast switching turbo vector

IP Normal CEF switching turbo vector

Input fast flags 0x0, Output fast flags 0x0

ifindex 269(269)

Slot 3 Slot unit 1 VC -1

Transmit limit accumulator 0x0 (0x0)

IP MTU 1500

How do I enabled dCef for my 3 6748 line cards and keep normal Cef on the 6724?

I have this problem too.
0 votes
Correct Answer by lamav about 6 years 1 month ago

Joseph:

He does have dCEF cards installed.

2 Distributed Forwarding Card WS-F6700-DFC3B SAD0951031D 4.2 Ok

3 Distributed Forwarding Card WS-F6700-DFC3B SAL1006CXXM 4.2 Ok

4 Distributed Forwarding Card WS-F6700-DFC3B SAD0951030D 4.2 Ok

Mr. Noobie:

Enter the ip cef distributed command in global config mode.

HTH

If so, kindly rate this post

Victor

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Average Rating: 5 (1 ratings)
JosephDoherty Fri, 03/07/2008 - 16:56

I believe dCEF is dependent on whether there's a DFC installed on the line card.

Correct Answer
lamav Fri, 03/07/2008 - 19:47

Joseph:

He does have dCEF cards installed.

2 Distributed Forwarding Card WS-F6700-DFC3B SAD0951031D 4.2 Ok

3 Distributed Forwarding Card WS-F6700-DFC3B SAL1006CXXM 4.2 Ok

4 Distributed Forwarding Card WS-F6700-DFC3B SAD0951030D 4.2 Ok

Mr. Noobie:

Enter the ip cef distributed command in global config mode.

HTH

If so, kindly rate this post

Victor

cisconoobie Mon, 03/10/2008 - 11:48

Thanks for response, before I enable "ip cef distributed", will I lose connectivity and will my 6724 that does not have DFC card still work properly?

lamav Mon, 03/10/2008 - 11:52

The short answers are no and yes, respectively.

If you're worried, set up a window and do it then.

No biggie.

Please rate my posts if they helped you

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Posted March 7, 2008 at 7:56 AM
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