51-5
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 51 Configuring NDE
Understanding NDE
Table 51-3
NDE Version 5 Flow Record Format
Bytes
Content
Description
Flow masks:
• X=Populated
• A=Additional field
(see the
“Populating Additional
NDE Fields” section on page 51-12
)
So
ur
ce
De
stin
a
tio
n
De
stin
a
tio
n
So
ur
ce
D
e
stin
a
tio
n
So
ur
ce
In
te
rf
a
c
e
Full
Full
In
te
rf
a
c
e
0–3
srcaddr
Source IP address
X
0
X
X
X
X
4–7
dstaddr
Destination IP address
0
X
X
X
X
X
8–11
nexthop
Next hop router’s IP address
1
1.
Always zero when PBR, WCCP, or SLB is configured.
0
A
2
2.
With the destination flow mask, the “Next hop router’s IP address” field and the “Output interface’s SNMP ifIndex” field might not contain information
that is accurate for all flows.
A
A
A
A
12–13 input
Ingress interface SNMP ifIndex
0
0
0
X
0
X
14–15 output
Egress interface SNMP ifIndex
3
3.
Always zero when policy-based routing is configured.
0
A
2
A
A
A
A
16–19 dPkts
Packets in the flow
X
X
X
X
X
X
20–23 dOctets
Octets (bytes) in the flow
X
X
X
X
X
X
24–27 first
SysUptime at start of the flow (milliseconds)
X
X
X
X
X
X
28–31 last
SysUptime at the time the last packet
of the flow was received (milliseconds)
X
X
X
X
X
X
32–33 srcport
Layer 4 source port number or equivalent
0
0
0
0
X
4
4.
In PFC3BXL or PFC3B mode, for ICMP traffic, contains the ICMP code and type values.
X
4
34–35 dstport
Layer 4 destination port number or equivalent
0
0
0
0
X
X
36 pad1 Unused
(zero)
byte
0
0
0
0
0
0
37
tcp_flags Cumulative OR of TCP flags
5
5.
Always zero for hardware-switched flows.
0
0
0
0
0
0
38
prot Layer
4
protocol
(for example, 6=TCP, 17=UDP)
0
0
0
0
X
X
39
tos
IP type-of-service byte
X
6
6.
Populated in PFC3BXL or PFC3B mode.
X
6
X
6
X
6
X
6
X
6
40–41 src_as
Autonomous system number of the source,
either origin or peer
X
0
X
X
X
X
42–43 dst_as
Autonomous system number of the
destination, either origin or peer
0
X
X
X
X
X
44–45 src_mask Source address prefix mask bits
X
0
X
X
X
X
46–47 dst_mask Destination address prefix mask bits
0
X
X
X
X
X
48
pad2
Pad 2
0
0
0
0
0
0
