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enable dCef on 6509

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, it shows IP CEF switching enabled but nothing about distributed.

#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?
Avatar of Don Johnston
Don Johnston
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You won't see anything in the config or with show commands because dCEF is enabled on all cards that support it and it can't be disabled.
Avatar of ralphcarter2008


Then what does the command "ip cef distributed" do ?
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Don Johnston
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