Difference between revisions of "IP CEF Cisco"
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</source> | </source> | ||
| − | =Links= | + | <source lang=cli> |
| + | Heimdal#<input>sh ip cef</input> | ||
| + | Prefix Next Hop Interface | ||
| + | 0.0.0.0/0 172.16.4.1 | ||
| + | 0.0.0.0/32 receive | ||
| + | 172.16.4.0/24 attached Vlan1 | ||
| + | 172.16.4.0/32 receive | ||
| + | 172.16.4.1/32 attached Vlan1 | ||
| + | 172.16.4.5/32 attached Vlan1 | ||
| + | 172.16.4.15/32 attached Vlan1 | ||
| + | 172.16.4.16/32 attached Vlan1 | ||
| + | 172.16.4.20/32 receive | ||
| + | 172.16.4.22/32 attached Vlan1 | ||
| + | 172.16.4.233/32 attached Vlan1 | ||
| + | 172.16.4.254/32 attached Vlan1 | ||
| + | 172.16.4.255/32 receive | ||
| + | 192.168.22.0/24 172.16.4.16 | ||
| + | 192.168.128.0/24 attached Vlan10 | ||
| + | 192.168.128.0/32 receive | ||
| + | 192.168.128.1/32 receive | ||
| + | 192.168.128.255/32 receive | ||
| + | 192.168.130.0/24 attached Vlan12 | ||
| + | 192.168.130.0/32 receive | ||
| + | 192.168.130.1/32 receive | ||
| + | 192.168.130.126/32 attached Vlan12 | ||
| + | 192.168.138.149/32 attached Vlan20 | ||
| + | 192.168.138.255/32 receive | ||
| + | 192.168.140.0/24 attached Vlan22 | ||
| + | <notice>...OUTPUT OMITTED...</notice> | ||
| + | </source> | ||
| + | == Adjacency table == | ||
| + | <source lang=cli> | ||
| + | SW1#<input>show adjacency</input> | ||
| + | Protocol Interface Address | ||
| + | IP Vlan1 172.16.4.5(7) | ||
| + | IP Vlan1 stella.tekkom.dk(7) | ||
| + | IP Vlan1 mars(9) | ||
| + | IP Vlan1 172.16.4.50(9) | ||
| + | IP Vlan1 172.16.4.60(9) | ||
| + | IP Vlan1 172.16.4.66(7) | ||
| + | IP Vlan12 192.168.130.126(7) | ||
| + | IP Vlan12 hot-pc-gf.tekkom.local(7) | ||
| + | IP Vlan28 192.168.146.145(7) | ||
| + | IP Vlan28 192.168.146.146(7) | ||
| + | IP Vlan28 192.168.146.149(7) | ||
| + | IP Vlan28 192.168.146.150(7) | ||
| + | IP Vlan28 192.168.146.151(7) | ||
| + | |||
| + | </source> | ||
| + | Looking at details | ||
| + | <source lang=cli> | ||
| + | SW1#<input>show adjacency 172.16.4.16 detail</input> | ||
| + | Protocol Interface Address | ||
| + | IP Vlan1 mars(9) | ||
| + | 0 packets, 0 bytes | ||
| + | epoch 0 | ||
| + | sourced in sev-epoch 4874 | ||
| + | Encap length 14 | ||
| + | <notice>0007E9400ABF</notice>0019E75108C00800 | ||
| + | ARP | ||
| + | SW1#<input>sh arp | inc 172.16.4.16</input> | ||
| + | Internet 172.16.4.16 1 <notice>0007.e940.0abf</notice> ARPA Vlan1 | ||
| + | |||
| + | </source> | ||
| + | |||
| + | ==Notes== | ||
| + | If you enable CEF and then create an access list that uses the log keyword, the packets that match the access list are not CEF switched. They are fast switched. Logging disables CEF. | ||
| + | |||
| + | http://www.cisco.com/en/US/docs/ios/12_2/switch/configuration/guide/xcfcef.html | ||
| + | |||
| + | |||
| + | ==Links== | ||
*See [http://www.cisco.com/en/US/docs/ios/12_2/switch/configuration/guide/xcfcefc.html] | *See [http://www.cisco.com/en/US/docs/ios/12_2/switch/configuration/guide/xcfcefc.html] | ||
{{source cli}} | {{source cli}} | ||
[[Category:Cisco]][[Category:CCNP3]] | [[Category:Cisco]][[Category:CCNP3]] | ||
Latest revision as of 07:04, 7 February 2014
3560 Switch platform
CEF
- show ip cef 0.0.0.0 0.0.0.0 internal
SW1#<input>show cef fib</input>
119 allocated IPv4 entries, 0 failed allocationsSW1#<input>show ip cef switching statistics</input>
Reason Drop Punt Punt2Host
RP RIB Packet destined for us 0 1412459 0
RP RIB Total 0 1412459 0
RP LES No adjacency 6399 0 100446
RP LES TTL expired 0 0 36
RP LES Total 6399 0 100482
All Total 6399 1412459 100482SW1#<input>show ip cef vrf * summary</input>
IPv4 CEF is enabled for distributed and running
VRF Default:
130 prefixes (130/0 fwd/non-fwd)
Default network 0.0.0.0/0
Table id 0, 0 resets
Database epoch: 1 (130 entries at this epoch)Heimdal#<input>sh ip cef</input>
Prefix Next Hop Interface
0.0.0.0/0 172.16.4.1
0.0.0.0/32 receive
172.16.4.0/24 attached Vlan1
172.16.4.0/32 receive
172.16.4.1/32 attached Vlan1
172.16.4.5/32 attached Vlan1
172.16.4.15/32 attached Vlan1
172.16.4.16/32 attached Vlan1
172.16.4.20/32 receive
172.16.4.22/32 attached Vlan1
172.16.4.233/32 attached Vlan1
172.16.4.254/32 attached Vlan1
172.16.4.255/32 receive
192.168.22.0/24 172.16.4.16
192.168.128.0/24 attached Vlan10
192.168.128.0/32 receive
192.168.128.1/32 receive
192.168.128.255/32 receive
192.168.130.0/24 attached Vlan12
192.168.130.0/32 receive
192.168.130.1/32 receive
192.168.130.126/32 attached Vlan12
192.168.138.149/32 attached Vlan20
192.168.138.255/32 receive
192.168.140.0/24 attached Vlan22
<notice>...OUTPUT OMITTED...</notice>Adjacency table
SW1#<input>show adjacency</input>
Protocol Interface Address
IP Vlan1 172.16.4.5(7)
IP Vlan1 stella.tekkom.dk(7)
IP Vlan1 mars(9)
IP Vlan1 172.16.4.50(9)
IP Vlan1 172.16.4.60(9)
IP Vlan1 172.16.4.66(7)
IP Vlan12 192.168.130.126(7)
IP Vlan12 hot-pc-gf.tekkom.local(7)
IP Vlan28 192.168.146.145(7)
IP Vlan28 192.168.146.146(7)
IP Vlan28 192.168.146.149(7)
IP Vlan28 192.168.146.150(7)
IP Vlan28 192.168.146.151(7)Looking at details
SW1#<input>show adjacency 172.16.4.16 detail</input>
Protocol Interface Address
IP Vlan1 mars(9)
0 packets, 0 bytes
epoch 0
sourced in sev-epoch 4874
Encap length 14
<notice>0007E9400ABF</notice>0019E75108C00800
ARP
SW1#<input>sh arp | inc 172.16.4.16</input>
Internet 172.16.4.16 1 <notice>0007.e940.0abf</notice> ARPA Vlan1Notes
If you enable CEF and then create an access list that uses the log keyword, the packets that match the access list are not CEF switched. They are fast switched. Logging disables CEF.
http://www.cisco.com/en/US/docs/ios/12_2/switch/configuration/guide/xcfcef.html
Links
- See [1]