07-05-2016 09:50 AM - edited 03-05-2019 04:22 AM
I'm having these strange network latency, crawling speed issues on a couple of Dell R610 servers I have. I have multiple other R610's with same specs, connected to the same Cisco 3750 switch and they're fine. I've done a lot of troubleshooting and still cannot fix the problem. I would appreciate help here. My observium shows no spikes on my network or aggressive traffic on any other server that would cause some bottle-necking of any kind.
1. Tried replacement NIC cards
2. Tried multiple ports on server NIC and Cisco switch
3. Tried Centos 6.8 and Centos 7
4. Upgraded NIC drivers via Dell OMSA
5. Replaced Cat5 cables
6. Rebooted Servers
7. GigE enabled on server and Cisco switch, full duplex
8. Tried both Google resolvers and data center resolvers
Public speed test though are so slow
[root@localhost ~]# wget -O /dev/null http://cachefly.cachefly.net/100mb.test --2016-07-05 13:32:59-- http://cachefly.cachefly.net/100mb.test Resolving cachefly.cachefly.net (cachefly.cachefly.net)... 205.234.175.175 Connecting to cachefly.cachefly.net (cachefly.cachefly.net)|205.234.175.175|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 104857600 (100M) [application/octet-stream] Saving to: ‘/dev/null’ 0% [ ] 162,475 24.4KB/s eta 73m 24s
Installed Dell OMSA this way:
INSTALL Dell System Update (DSU) AND OpenManage Server Administrator --------------------------------------------------------------------- yum install perl wget -y wget -q -O - https://linux.dell.com/repo/hardware/dsu/bootstrap.cgi | bash yum install dell-system-update -y yum install srvadmin-all -y /opt/dell/srvadmin/sbin/srvadmin-services.sh start dsu -u
07-06-2016 01:17 PM
On the other proper working servers, a 30MB/ps is common or greater. GigE uplink. On these 2 servers, 200Kb/s or less is common and the issue. I can rarely break 1MB/s. I did a quick intranet test, doing scp from my NAS to one of the problematic servers, slow 300-400KB/s transfer. NAS to a good server via intranet, scp method is normal 20-30+MB/s transfer. No QoS, NAT on switch. I have dual failover drops (Ethernet) from the data center upstream (blended bandwidth).These are Broadcom NICs. The servers are running with SSD, RAID 0 on H700 PERC. I have similar good servers with the same exact config with no issue.
[root@server2 ~]# lspci -v | grep Ethernet -A 1
01:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
Subsystem: Dell PowerEdge R610 BCM5709 Gigabit Ethernet
Flags: bus master, fast devsel, latency 0, IRQ 36
--
01:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
Subsystem: Dell PowerEdge R610 BCM5709 Gigabit Ethernet
Flags: bus master, fast devsel, latency 0, IRQ 48
--
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
Subsystem: Dell PowerEdge R610 BCM5709 Gigabit Ethernet
Flags: bus master, fast devsel, latency 0, IRQ 32
--
02:00.1 Ethernet controller: Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
Subsystem: Dell PowerEdge R610 BCM5709 Gigabit Ethernet
Flags: bus master, fast devsel, latency 0, IRQ 42
[root@server2 ~]# ethtool em1
Settings for em1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: off
Supports Wake-on: g
Wake-on: d
Link detected: yes
[root@localhost ~]# ethtool -i em1 driver: bnx2 version: 2.2.6 firmware-version: 7.12.19 bc 7.10.0 NCSI 2.0.13 bus-info: 0000:01:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no
Output from switch on the 2 ports...
Cisco3750#show interface Gi1/0/13
GigabitEthernet1/0/13 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 001f.6c8a.938d (bia 001f.6c8a.938d)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, 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)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
23470 packets input, 5854358 bytes, 0 no buffer
Received 12 broadcasts (5 multicasts)
Cisco3750#show interface Gi1/0/12
GigabitEthernet1/0/12 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 001f.6c8a.938c (bia 001f.6c8a.938c)
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:01, 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)
5 minute input rate 3000 bits/sec, 5 packets/sec
5 minute output rate 182000 bits/sec, 6 packets/sec
286214 packets input, 35687041 bytes, 0 no buffer
Received 29 broadcasts (23 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 23 multicast, 0 pause input
0 input packets with dribble condition detected
479017 packets output, 484189224 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
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
Cisco VLAN Output
VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 2 VLAN2 active Gi1/0/13 93 VLAN93 active Gi1/0/12
Cisco3750#show run interface g1/0/12 Building configuration... Current configuration : 115 bytes ! interface GigabitEthernet1/0/12 switchport access vlan 93 switchport mode access speed 1000 duplex full end Cisco3750#show run interface g1/0/13 Building configuration... Current configuration : 114 bytes ! interface GigabitEthernet1/0/13 switchport access vlan 2 switchport mode access speed 1000 duplex full end
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