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Network elements include complex stateful features
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Require testing with stateful and real traffic mix
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Traffic generators of stateful/realistic traffic are:
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Expensive ~$100-500K
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Not scalable for high rates
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Not flexible
-
-
Due to cost, quality is impacted
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Limited access / testing
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Late testing
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No standard
-
-
TRex is a statefull traffic generator tool based on a smart replay of real flows (not a full TCP/IP stack,yet)
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Generates, manipulates and amplifies based on templates of a real/captured flows.
-
Templates are processed offline
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High performance full line rate
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tx= up to 200Gb/sec rx=up to 200Gb/sec
-
-
Low cost C220M UCS-1RU, Cisco internal eqip
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Generate both sides of the traffic Clients and Servers
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Standard hardware (X86/Intel NIC I350,82599,XL710)
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Flexible and Open Software (DPDK)
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Support Virtualization
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Virtual interface support E1000 , VMXNET3. Enabler for
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Amazon AWS
-
Cisco LaaS
-
-
DPDK
-
user space driver
-
Big TLB
-
Utilize all DDR banks
-
-
Multi-Threaded
-
Scale linearly
-
~20Gb/sec per DP core
-
-
No TCP-IP
-
Fast events scheduler
-
Generate flows template
-
Can support 1K templates
-
-
Slow-path flexibility (per-flow)
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Client/server generation
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Measure latency
-
Measure flow order
-
NAT translation learning
-
-
traffic profile is in YAML fomat
$more cap2/dns_test.yaml
- duration : 10.0
generator :
distribution : "seq"
clients_start : "16.0.0.1"
clients_end : "16.0.0.255"
servers_start : "48.0.0.1"
servers_end : "48.0.0.255"
dual_port_mask : "1.0.0.0"
tcp_aging : 1
udp_aging : 1
cap_info :
- name: cap2/dns.pcap (1)
cps : 1.0 (2)-
the pcap file that include DNS cap file that will be replicate
-
how many connection per second to generate, 1.0 means 1 connection per secod
| pkt | time sec | fid | flow-pkt-id | client_ip | client_port | server_ip | direction |
|---|---|---|---|---|---|---|---|
1 |
0.010000 |
1 |
1 |
16.0.0.1 |
1024 |
48.0.0.1 |
→ |
2 |
0.020000 |
1 |
2 |
16.0.0.1 |
1024 |
48.0.0.1 |
← |
3 |
2.010000 |
2 |
1 |
16.0.0.2 |
1024 |
48.0.0.2 |
→ |
4 |
2.020000 |
2 |
2 |
16.0.0.2 |
1024 |
48.0.0.2 |
← |
5 |
3.010000 |
3 |
1 |
16.0.0.3 |
1024 |
48.0.0.3 |
→ |
6 |
3.020000 |
3 |
2 |
16.0.0.3 |
1024 |
48.0.0.3 |
← |
7 |
4.010000 |
4 |
1 |
16.0.0.4 |
1024 |
48.0.0.4 |
→ |
8 |
4.020000 |
4 |
2 |
16.0.0.4 |
1024 |
48.0.0.4 |
← |
9 |
5.010000 |
5 |
1 |
16.0.0.5 |
1024 |
48.0.0.5 |
→ |
10 |
5.020000 |
5 |
2 |
16.0.0.5 |
1024 |
48.0.0.5 |
← |
11 |
6.010000 |
6 |
1 |
16.0.0.6 |
1024 |
48.0.0.6 |
→ |
- duration : 1.0
generator :
distribution : "seq"
clients_start : "16.0.0.1"
clients_end : "16.0.0.10"
servers_start : "48.0.0.1"
servers_end : "48.0.0.3"
dual_port_mask : "1.0.0.0"
tcp_aging : 1
udp_aging : 1
cap_ipg : true
cap_info :
- name: cap2/dns.pcap
cps : 10.0 (1)
- name: avl/delay_10_http_browsing_0.pcap
cps : 2.0 (1)-
Diffrent CPS
-
Inter packet Gap (IPG) is taken from pcap file
-
IPG can be manualy set
-
-
EMIX traffic profile suggested. used for NBAR/AVC tests
-
Property
-
BW: 70% TCP (http, mail) , 30% UDP (rtp)
-
Connections: 50% TCP (http, mail) , 50% UDP (rtp, dns)
-
Avg. Packet Size (~585B)
-
PPS= 221K per 1Gb/sec
-
CPS = 4K per 1Gb/sec
-
Flows per 1Gb/sec = 50K
-
Avg. Packets per flow (50)
-
- duration : 0.1
generator :
distribution : "seq"
clients_start : "16.0.0.1"
clients_end : "16.0.1.255"
servers_start : "48.0.0.1"
servers_end : "48.0.20.255"
dual_port_mask : "1.0.0.0"
cap_ipg : true
cap_info :
- name: avl/delay_10_http_get_0.pcap
cps : 404.52
- name: avl/delay_10_http_post_0.pcap
cps : 404.52
- name: avl/delay_10_https_0.pcap
cps : 130.8745
- name: avl/delay_10_http_browsing_0.pcap
cps : 709.89
- name: avl/delay_10_exchange_0.pcap
cps : 253.81
- name: avl/delay_10_mail_pop_2.pcap
cps : 4.759
- name: avl/delay_10_oracle_0.pcap
cps : 79.3178
- name: avl/delay_10_rtp_160k_full.pcap
cps : 2.776
- name: avl/delay_10_smtp_0.pcap
cps : 7.3369
- name: avl/delay_10_sip_video_call_full.pcap
cps : 29.347
- name: avl/delay_10_citrix_0.pcap
cps : 43.6248
- name: avl/delay_10_dns_0.pcap
cps : 1975.015$.sudo /t-rex-64 -f [traffic_yaml] -m [muti] -d [duration] -l [Hz=1000] -c [cores]- -f=TRAFFIC_CFG
-
Traffic YAML configuration file
- -m
-
CPS multiplier
- -d=DURATION
-
Duration of the test in sec
- -l=Hz
-
Latency pakets rate (Hz)
- -c
-
How many cores to use
-
All in One, most of the functionality of existing tools
-
Standard tests (e.g. traffic mix, automation) across features/platforms
-
Cisco wide developers community
-
Open source, Standardize tests
-
Monitor GUI works on Windows 7
-
Nonitor real-time properties of TRex ( e.g min/max/average latency,jitter )
import trex_client
trex = trex_client.CTRexClient('csi-kiwi-02')
ret = trex.start_trex(
m = 1.1,
d = 20,
f = 'avl/sfr_delay_10_1g.yaml',
l = 1000)
while trex.is_running() :
trex.get_running_info()
res=trex.get_result_obj()
if res.is_done_warmup ():
res.get_value_list("trex-global.data.m_tx_bps");
time.sleep(1);
ret = trex.stop_trex()
-
This presentation is about Stateful mode, have a look into Stateless (STL) and Advance Stateful (ASTF) models
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