Hello, I have a ME-3600X-24FS-M with a 10GE interface facing an LTE core network and a 1GE interface to a remote node. The client wants to achieve 50Mbps on a single tcp session with an RTT of 50ms, so the BDP is about 300KB, however the congestion window seems to be stuck at around 44KB due to packet drops due to the microbursts.
The offending interface appears to be: GigabitEthernet0/23 is up, line protocol is up (connected) Hardware is Gigabit Ethernet, address is 24b6.574b.5297 (bia 24b6.574b.5297) Description: MTU 1610 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive not set Full-duplex, 1000Mb/s, media type is LX input flow-control is off, output flow-control is unsupported ARP type: ARPA, ARP Timeout 04:00:00 Last input never, output never, output hang never Last clearing of "show interface" counters 05:10:14 Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1815 Queueing strategy: fifo Output queue: 0/2512 (size/max) 30 second input rate 1000 bits/sec, 1 packets/sec 30 second output rate 48000 bits/sec, 11 packets/sec 31938 packets input, 2874462 bytes, 0 no buffer Received 31938 broadcasts (31938 multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 31938 multicast, 0 pause input 0 input packets with dribble condition detected 13997301 packets output, 19484128487 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 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 We increased the output queue but still getting drops, any other tips? Thanks, Abel. _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/