I have a problem with fast switching and cef that confuses me. Two 1760 routers are connected by UTP patchcord and this patchcord is plugged into ethernet interface of the corresponding router. Examiming #sh int switching on each router I have noticed that packets are not fast switched on these two ethernet interfaces on both routers, they are process-switched that consumes CPU power. Both fast switching and CEF are enabled on every interface of each router and work fine for EVERY interface exept these two ethernet interfaces. What's wrong with these two interconnected interfaces?
IOS version and hardware are the same on both routers.
tr-02>sh ver Cisco Internetwork Operating System Software IOS (tm) C1700 Software (C1700-K9O3SY7-M), Version 12.3(9), RELEASE SOFTWARE (fc2) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Fri 14-May-04 15:39 by dchih Image text-base: 0x80008120, data-base: 0x81021588
ROM: System Bootstrap, Version 12.2(4r)XL, RELEASE SOFTWARE (fc1)
rtr-02 uptime is 1 week, 5 days, 18 hours, 6 minutes System returned to ROM by power-on System restarted at 22:02:15 msk Tue Oct 4 2005 System image file is "flash:c1700-k9o3sy7-mz.123-9.bin"
cisco 1760 (MPC860P) processor (revision 0x200) with 83313K/14991K bytes of memory. Processor board ID FOC06370PTT (655533886), with hardware revision BB67
MPC860P processor: part number 5, mask 2 Bridging software. X.25 software, Version 3.0.0.
interface Ethernet1/0 ip address 192.168.0.1 255.255.255.252 ip route-cache policy ip route-cache flow full-duplex no cdp enable
rtr-01#sh ip int eth 1/0 Ethernet1/0 is up, line protocol is up Internet address is 192.168.0.1/30 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Multicast reserved groups joined: 224.0.0.10 Outgoing access list is not set Inbound access list is not set Proxy ARP is enabled Local Proxy ARP is disabled Security level is default Split horizon is enabled ICMP redirects are always sent ICMP unreachables are always sent ICMP mask replies are never sent IP fast switching is enabled IP fast switching on the same interface is disabled IP Flow switching is enabled IP CEF switching is enabled IP CEF Flow Fast switching turbo vector IP multicast fast switching is enabled IP multicast distributed fast switching is disabled IP route-cache flags are Fast, Flow, Policy, CEF, Flow Cache Router Discovery is disabled IP output packet accounting is disabled IP access violation accounting is disabled TCP/IP header compression is disabled RTP/IP header compression is disabled Policy routing is disabled Network address translation is disabled WCCP Redirect outbound is disabled WCCP Redirect inbound is disabled WCCP Redirect exclude is disabled BGP Policy Mapping is disabled
Ethernet1/0 Throttle count 0 Drops RP 0 SP 0 SPD Flushes Fast 0 SSE 0 SPD Aggress Fast 0 SPD Priority Inputs 239496 Drops 0
Protocol IP Switching path Pkts In Chars In Pkts Out Chars Out Process 45447951 2732162903 47565463 2893883250 Cache misses 0 - - - Fast 22993570 1675987856 19544319 2564290110 Auton/SSE 0 0 0 0
Protocol ARP Switching path Pkts In Chars In Pkts Out Chars Out Process 80 4800 81 4860 Cache misses 0 - - - Fast 0 0 0 0 Auton/SSE 0 0 0 0
Protocol Other Switching path Pkts In Chars In Pkts Out Chars Out Process 0 0 110246 6614760 Cache misses 0 - - - Fast 0 0 0 0 Auton/SSE 0 0 0 0
Second router: rtr-02
interface FastEthernet0/0 description Link to LAN ip address 192.168.0.2 255.255.255.252 ip access-group 104 in ip nat inside ip inspect fw in ip route-cache policy ip route-cache flow speed auto full-duplex no cdp enable
rtr-02>sh ip int fa 0/0 FastEthernet0/0 is up, line protocol is up Internet address is 192.168.0.2/30 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Multicast reserved groups joined: 224.0.0.10 Outgoing access list is not set Inbound access list is 104 Proxy ARP is enabled Local Proxy ARP is disabled Security level is default Split horizon is enabled ICMP redirects are always sent ICMP unreachables are always sent ICMP mask replies are never sent IP fast switching is enabled IP fast switching on the same interface is disabled IP Flow switching is enabled IP CEF switching is enabled IP CEF Flow Fast switching turbo vector IP multicast fast switching is enabled IP multicast distributed fast switching is disabled IP route-cache flags are Fast, Flow, Policy, CEF, Flow Cache Router Discovery is disabled IP output packet accounting is disabled IP access violation accounting is disabled TCP/IP header compression is disabled RTP/IP header compression is disabled Policy routing is disabled Network address translation is enabled, interface in domain inside WCCP Redirect outbound is disabled WCCP Redirect inbound is disabled WCCP Redirect exclude is disabled BGP Policy Mapping is disabled Inbound inspection rule is fw
rtr-02>sh int switching FastEthernet0/0 Link to LAN Throttle count 0 Drops RP 0 SP 0 SPD Flushes Fast 0 SSE 0 SPD Aggress Fast 0 SPD Priority Inputs 241154 Drops 0
Protocol IP Switching path Pkts In Chars In Pkts Out Chars Out Process 51361818 3424905116 51332592 3513595437 Cache misses 0 - - - Fast 15713046 2065212505 17074412 864857887 Auton/SSE 0 0 0 0
Protocol ARP Switching path Pkts In Chars In Pkts Out Chars Out Process 81 4860 80 4800 Cache misses 0 - - - Fast 0 0 0 0 Auton/SSE 0 0 0 0
Protocol Other Switching path Pkts In Chars In Pkts Out Chars Out Process 0 0 110198 6611880 Cache misses 0 - - - Fast 0 0 62 93372 Auton/SSE 0 0 0 0
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