Example Ethernet Frame with Layer 2 QoS Enabled
The example below shows an Ethernet Frame containing one RTP (speech) packet. The Frame is
VLAN tagged, has a VLAN ID of 99 and a VLAN Priority of 5. It is also possible to see that the Layer 3
QoS has not been set.
Ethernet Frame Example - Layer 2 QoS Enabled
Source Destination Protocol
172.16.0.101 172.16.0.21 RTP
Info
Payload type=ITU-T G.729, SSRC=701655963, Seq=28165, Time=21520
Frame 160 (78 bytes on wire, 78 bytes captured)
Arrival Time: Jan 18, 2005 13:55:44.842738000
Time delta from previous packet: 0.008241000 seconds
Time since reference or first frame: 2.910072000 seconds
Frame Number: 160
Packet Length: 78 bytes
Capture Length: 78 bytes
Ethernet II, Src: 00:60:b9:c6:6e:45, Dst: 00:60:b9:c1:ab:a3
Destination: 00:60:b9:c1:ab:a3 (Nitsuko_c1:ab:a3)
Source: 00:60:b9:c6:6e:45 (Nitsuko_c6:6e:45)
Type: 802.1Q Virtual LAN (0xSL2100)
802.1q Virtual LAN
101. .... .... .... = Priority: 5 (Layer 2 Priority = 5)
...0 .... .... .... = CFI: 0
.... 0000 0110 0011 = ID: 99
Type: IP (0x0800)
Internet Protocol, Src Addr: 172.16.0.101 (172.16.0.101), Dst Addr:
172.16.0.21 (172.16.0.21)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00)
0000 00.. = Differentiated Services Codepoint: Default
(0x00)
.... ..0. = ECN-Capable Transport (ECT): 0
.... ...0 = ECN-CE: 0
Total Length: 60
Identification: 0x0086 (134)
Flags: 0x00
0... = Reserved bit: Not set
.0.. = Don't fragment: Not set
..0. = More fragments: Not set
Fragment offset: 0
Time to live: 30
Protocol: UDP (0x11)
Header checksum: 0x4391 (correct)
Source: 172.16.0.101 (172.16.0.101)
Destination: 172.16.0.21 (172.16.0.21)
User Datagram Protocol, Src Port: 10022 (10022), Dst Port: 10020 (10020)
Source port: 10022 (10022)
Destination port: 10020 (10020)
Length: 40
Checksum: 0x0581 (correct)
Real-Time Transport Protocol
Stream setup by SDP (frame 1)
Setup frame: 1
Setup Method: SDP
10.. .... = Version: RFC 1889 Version (2)
..0. .... = Padding: False
...0 .... = Extension: False
.... 0000 = Contributing source identifiers count: 0
0... .... = Marker: False
.001 0010 = Payload type: ITU-T G.729 (18)
Sequence number: 28165
Timestamp: 21520
Synchronization Source identifier: 701655963
Payload: 76AC9D7AB6ACE2510B3A3338646DA738...
ISSUE 1.0
SL2100
Networking Manual 6-13
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