Packet switching not EFC / what is 'classification of output EAC?
Hello
I noticed a 3945-DRY with fairly high CPU load without doing much, because there are more packages switching process that the CFR switched.
To study, I did the following:
Router #sh ip cef switching statistics feature
Input characteristics IPv4 CEF:
Feature road Drop consume Punt Punt2Host gave
Access the list 24911921 0 0 14678240 0
0 0 0 0 20433673 routing policy
24911921 0 0 14678240 20433673 total
Output features IPv4 CEF:
Feature Drop consume Punt Punt2Host new i / f
Class output EAC 715266717 0 0 0 0
Total 0 0 715266717 0 0
Characteristics of post-encap IPv4 CEF:
Feature Drop consume Punt Punt2Host new i / f
IPSEC Post-encap 1 655816389 0 0 0
Total 1 655816389 0 0 0
CEF IPv4 for us offers:
Feature Drop consume Punt Punt2Host new i / f
Total 0 0 0 0 0
Features of punt IPv4 CEF:
Feature Drop consume Punt Punt2Host new i / f
Total 0 0 0 0 0
Features local IPv4 CEF:
Feature road Drop consume Punt Punt2Host gave
Total 0 0 0 0 0
Punted them (= "punted" another mechanism of switching, not switched cef) packages for the feature 'EAC exit class' increase of ~ 1000 per second.
This made me wonder, what exactly is the feature 'CEC output class'. As I can see in the following output, this feature is enabled on my Tunnel Interface:
Router ip int tu0 #sh
Tunnel0 is up, line protocol is up
The Internet address is x.x.x.x/xx
Broadcast address is x.x.x.x
Address determined by non-volatile memory
MTU is 1400 bytes
Support address is not set
Transfer of directed broadcast is disabled
Multicast reserved joined groups: 224.0.0.10
Outgoing access list is not defined
Inbound access list is not defined
Proxy ARP is disabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are never sent
ICMP unreachable is always sent
Mask the ICMP responses are never sent
IP fast switching is enabled
Fast on the same switching interface IP is disabled
IP stream switching is disabled
IP CEF switching is enabled
Vector turbo IP CEF switching
Turbo IP vector draw
Tunnel VPN routing/Forwarding "xxx".
Quick change IP multicast is enabled
Fast switching of distributed IP multicast is disabled
Flags of IP route cache is fast, CEF
Router discovery is disabled
Output IP packet accounting is disabled
Accounting of IP access violation is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Policy routing is disabled
Network address translation is disabled
BGP policy mapping is disabled
Input characteristics: process Packet Capture, check MCI, TCP adjust MSS
Characteristics of the output: classification of output of EAC, PNDH redirect, adjust EAC ranking NAT, TCP MSS, QoS preclassification
Display the characteristics of encapsulation: IPSEC Post-encap output classification
WCCP redirect outgoing is disabled
WCCP redirect incoming is disabled
WCCP redirect exclude is disabled
Someone tell me, what is "CCE output ranking" and why this is receptive used by my router?
Hello Sebastian,.
EAC is the engine of common classification. I think that its used to "match" traffic for features like qos, nat, etc.. ". Based on the "HS in you ' out, some features on the direction of the output are originally be punted packets. You can try "debug ip cef drop" for a few seconds while the meter is incremented, usually it will give a reason to punt. The most common reasons are listed below.
ACL log or log-entry option (or)
An unreachable next hop for a route (or)
A missing arp entry for a next jump (or)
Entry to arp for outside nat... etc.
Please rate this post without fault if you found it useful. *
Thank you best regards &,.
Vignesh R P
Tags: Cisco Network
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