I have Verizon FIOS 150/65 service. I recently upgraded my router from the stock Actiontec router provided by Verizon to a Cisco 3845. After the upgrade my up and down speeds are peaking at about 55Mbit/second. Prior to installing the 3845 I was maxing out the service with full 150/65 with sustained speed tests. I tried another Cisco router as well and I am getting the same results. As soon as I go back to the Actiontec the speed increases again. I did notice that i have quite a few collisions incrementing on the interfaces and I believe my configuration is more than likely to blame. I have done as much troubleshooting as possible but I am not finding what is limiting the throughput. My CPU is bored almost 100% of the time, even with heavy traffic traversing the router. My memory is also bored. I thought a fresh set of eyes on the problem may shed some light...
Since the CPU is remaining low I do not believe the router is forced to process these packets in software.
I have attached two images of my 24 hour usage (5 minute increments) of both CPU and WAN facing interface...
My current interface config is:
edge3845a#show run int gi0/0
Building configuration...
Current configuration : 363 bytes
!
interface GigabitEthernet0/0
ip address dhcp
no ip proxy-arp
ip flow ingress
ip nat outside
ip virtual-reassembly in drop-fragments
logging event subif-link-status
load-interval 30
duplex auto
speed auto
media-type rj45
no cdp enable
end
See below output showing collisions:
edge3845a#show int gi0/0
GigabitEthernet0/0 is up, line protocol is up
Hardware is BCM1125 Internal MAC, address is 0024.c4b9.e1b0 (bia 0024.c4b9.e1b0)
Internet address is 72.68.75.157/24
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: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
30 second input rate 777000 bits/sec, 77 packets/sec
30 second output rate 46000 bits/sec, 59 packets/sec
338341298 packets input, 590212818 bytes, 0 no buffer
Received 4 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 4294899676 multicast, 0 pause input
181774919 packets output, 3635425020 bytes, 0 underruns
0 output errors, 3758022391 collisions, 1 interface resets
0 unknown protocol drops
0 babbles, 4294705023 late collision, 0 deferred
2 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
edge3845a#show controllers gigabitEthernet 0/0
Interface GigabitEthernet0/0 (idb 0x692D67D0)
Hardware is BCM1125 Internal MAC (Revision A3)
network link is up
Config is Auto Speed, Auto Duplex
Selected media-type is RJ45
SFP is not present
MAC Registers:
ds->rx_all_multicast = 0x0
mac_hash_0_0 = 0x0000000000000000
mac_hash_1_0 = 0x0000000000000000
mac_hash_2_0 = 0x0080000400000000
mac_hash_3_0 = 0x0000000000000000
mac_hash_4_0 = 0x0000000000000000
mac_hash_5_0 = 0x0000000000000000
mac_hash_6_0 = 0x0001000000000000
mac_hash_7_0 = 0x0000000000000000
mac_admask_0 = 0x0000FFFFFFFFFFFF, mac_admask_1 = 0x0000000000000000
mac_cfg = 0x000000C8000A0176, mac_thrsh_cfg = 0x0000080400087804
mac_vlantag = 0x0000000000000000, mac_frame_cfg = 0x05F4400000280200
mac_adfilter_cfg = 0x0000000000000F28, mac_enable = 0x0000000000000C11
mac_status = 0x0000000000000000, mac_int_mask = 0x00004F0000C300C3
mac_txd_ctl = 0x000000000000000F, mac_eth_addr = 0x0000B0E1B9C42400
mac_fifo_ptrs = 0x05F4400000280200, mac_eopcnt = 0x000044000F0F0F0F
MAC RX is enabled RX DMA - channel 0 is enabled, channel 1 is disabled
MAC TX is enabled TX DMA - channel 0 is enabled, channel 1 is disabled
Device status = 1000 Mbps, Full-Duplex
PHY registers
-------------
BCM5461S DETECTED
Register 0x00: 1000 796D 0020 60C1 05E1 C5E1 000D 2001
Register 0x08: 4B75 0200 7800 0000 0000 0000 0000 3000
Register 0x10: 0000 2F00 0000 0000 0000 xxxx xxxx xxxx
Register 0x18: shdw 871F 0000 FFFF shdw shdw 8000 0000
Shadow Registers for 0x18
shadow-addr 0x0000 val 0400
shadow-addr 0x0001 val 0001
shadow-addr 0x0002 val 0282
shadow-addr 0x0004 val 0004
shadow-addr 0x0007 val 7067
Shadow Registers for 0x1C
shadow-addr 0x0002 val 0800
shadow-addr 0x0003 val 0C00
shadow-addr 0x0004 val 100C
shadow-addr 0x0005 val 141F
shadow-addr 0x0008 val 2144
shadow-addr 0x0009 val 2408
shadow-addr 0x000A val 2801
shadow-addr 0x000D val 3410
shadow-addr 0x000E val 3863
shadow-addr 0x000F val 3C00
shadow-addr 0x0018 val 6004
shadow-addr 0x001A val 6903
shadow-addr 0x001B val 6C87
shadow-addr 0x001C val 7000
shadow-addr 0x001D val 7400
shadow-addr 0x001E val 78E2
shadow-addr 0x001F val 7CA8
Shadow Registers for 0x1D
shadow-addr 0x0000 val 054F
shadow-addr 0x0001 val 8800
Internal Driver Information:
lc_ip_turbo_fs = 0x0, ip_routecache = 0x11 (dfs = 0/mdfs = 0)
rx cache size = 768, rx cache end = 512
max_mtu = 1524
ring sizes: RX = 256, TX = 256
rx_particle_size: 1536
Rx Channel 0:
dma_config0 = 0x0010002001000888, dma_config1 = 0x002A000000600029
dma_dscr_base = 0x000000000DC20C80, dma_dscr_cnt = 0x0000000000000100
dma_cur_dscr_a = 0x000030000DC66A92, dma_cur_dscr_b = 0x0100000000000000
dma_cur_daddr = 0x000100000DC213E0
rxring = 0x2DC20C80, shadow = 0x692D8C30, head = 118 (0x2DC213E0)
rx_overrun=0, rx_nobuffer=0, rx_discard=0
Error Interrupts: rx_int_dscr = 0, rx_int_derr = 0, rx_int_drop = 0
Tx Channel 0:
dma_config0 = 0x000000000100108C, dma_config1 = 0x00A9000000000010
dma_dscr_base = 0x000000000DC21CC0, dma_dscr_cnt = 0x0000000000000000
dma_cur_dscr_a = 0x800000000E5EE12A, dma_cur_dscr_b = 0x00F0000000004603
dma_cur_daddr = 0x000000000DC22A30
txring = 0x2DC21CC0, shadow = 0x692D9064, head = 215, tail = 215, tx_count = 0
Error Interrupts: tx_int_dscr = 0, tx_int_derr = 0, tx_int_dzero = 0
chip_state = 2, ds->tx_limited = 0
throttled = 0, enabled = 0, disabled = 0
reset=2(init=1, restart=1), auto_restart=2
tx_underflow = 0, tx_overflow = 0
rx_underflow = 0, rx_overflow = 0, filtered_pak=0
descriptor mismatch = 0, fixed alignment = 0
bad length = 0 dropped, 0 corrected
unexpected sop = 0
Software MAC address filter(hash:length/addr/mask/hits):
need_af_check = 0
0x00: 0 ffff.ffff.ffff 0000.0000.0000 0
0x74: 0 0024.c4b9.e1b0 0000.0000.0000 338362995
0xC0: 0 0180.c200.0002 0000.0000.0000 0
0xC0: 1 0100.0ccc.cccc 0000.0000.0000 0
0xC5: 0 0180.c200.0007 0000.0000.0000 0
Address Filter:
Promiscuous mode OFF
Multicast software filter needed: 1
Exact match table (for unicast, maximum 8 entries):
Entry 0 MAC Addr = 0024.c4b9.e1b0
(All other entries are empty)
Hash match table (for multicast, maximum 8 entries):
Entry 0 MAC Addr = 0180.c200.0007
Entry 1 MAC Addr = 0180.c200.0002
Entry 2 MAC Addr = 0100.0ccc.cccc
(All other entries are empty)
Statistics:
Rx Bytes 444355328899 Tx Bytes 98888958847
Rx Good Packets 338362998 Tx Good Packets 181788025
Rx Multicast 0
Rx Broadcast 2
Rx Bad Pkt Errors 0 Tx Bad Pkt Errors 0
Rx FCS Errors 0 Tx FCS Errors 0
Rx Runt Errors 0 Tx Runt Errors 0
Rx Oversize Errors 0 Tx Oversize Errors 0
Rx Length Errors 0 Tx Collisions 0
Rx Code Errors 0 Tx Late Collisions 0
Rx Dribble Errors 0 Tx Excessive Collisions 0
Tx Abort Errors 0
If you have any thoughts about what the problem may be I would appreciate the feedback. I am really trying to build on my troubleshooting skills and this is a great opportunity to learn.
Thank you to everyone in advance!
