I have a 3945 here for my home lab. I have noticed that with my ISP WAN connected to gi0/2 and a very basic config I can't get more than about 96Mbps internet speedtest throughput on my PC. I've tried the Ether switch module with my PC on it and also a 3750x hung off gi0/1 neither make any difference and all are Gigabit ports. I have checked speed, duplex, everything to no avail.
If I unplug the same exact ISP WAN connection from the 3945 and plug it into my Meraki MX-64 with my same exact PC, I get 150Mbps which is my rated ISP bandwidth.
The 3945 should be doing well better than that from what I read. I don't understand what could be the issue. It's a lab and has no utilization. CPU is also minimal to nothing.
C3945#sh int gi0/2
GigabitEthernet0/2 is up, line protocol is up
Hardware is PQ3_TSEC, address is 0078.887d.3b82 (bia 0078.887d.3b82)
Description: WAN
Internet address is OMITTED
MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full Duplex, 1Gbps, media type is RJ45
output flow-control is XON, input flow-control is XON
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/184/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 31000 bits/sec, 48 packets/sec
5 minute output rate 9000 bits/sec, 9 packets/sec
1975049 packets input, 499630732 bytes, 0 no buffer
Received 1547225 broadcasts (0 IP multicasts)
0 runts, 0 giants, 5 throttles
1 input errors, 0 CRC, 0 frame, 1 overrun, 0 ignored
0 watchdog, 1050 multicast, 0 pause input
338072 packets output, 138543068 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
1050 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
C3945#sh ip int gi0/2
GigabitEthernet0/2 is up, line protocol is up
Internet address is OMITTED
Broadcast address is 255.255.255.255
Address determined by DHCP
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
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 disabled
IP CEF switching is enabled
IP CEF switching turbo vector
IP multicast fast switching is enabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast, CEF
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 outside
BGP Policy Mapping is disabled
Input features: Common Flow Table, Stateful Inspection, Virtual Fragment Reassembly, Virtual Fragment Reassembly After IPSec Decryption, NAT Outside, MCI Check
Output features: Post-routing NAT Outside, Common Flow Table, Stateful Inspection, NAT ALG proxy
IPv4 WCCP Redirect outbound is disabled
IPv4 WCCP Redirect inbound is disabled
IPv4 WCCP Redirect exclude is disabled
C3945#
#sh proc cpu
CPU utilization for five seconds: 1%/0%; one minute: 1%; five minutes: 1%
Any ideas what could be going on?
Thanks!
