Important Points To Remember - Dell Force10 Z9000 Configuration Manual

Examples of Verifying Extended sFlow
The bold line shows that extended sFlow settings are enabled on all three types.
Dell#show sflow
sFlow services are enabled
Egress Management Interface sFlow services are disabled
Global default sampling rate: 32768
Global default counter polling interval: 20
Global default extended maximum header size: 128 bytes
Global extended information enabled: none
1 collectors configured
Collector IP addr: 100.1.1.1, Agent IP addr: 1.1.1.2, UDP port: 6343 VRF: Default
0 UDP packets exported
0 UDP packets dropped
0 sFlow samples collected
stack-unit 0 Port set 0
Te 1/1: configured rate 16384, actual rate 16384
Dell#
If you did not enable any extended information, the show output displays the following (shown in bold).
Dell#show sflow
sFlow services are disabled
Global default sampling rate: 32768
Global default counter polling interval: 20
Global extended information enabled: none
0 collectors configured
0 UDP packets exported
0 UDP packets dropped
0 sFlow samples collected
0 sFlow samples dropped due to sub-sampling

Important Points to Remember

• To export extended-gateway data, BGP must learn the IP destination address.
• If the IP destination address is not learned via BGP the Dell Networking system does not export extended-gateway data.
• If the IP source address is learned via IGP, srcAS and srcPeerAS are zero.
• The srcAS and srcPeerAS might be zero even though the IP source address is learned via BGP. The c system packs the srcAS
and srcPeerAS information only if the route is learned via BGP and it is reachable via the ingress interface of the packet.
• The sFlow sampling functionality is supported only for egress traffic and not for ingress traffic.
The previous points are summarized in following table.
Table 50. Extended Gateway Summary
IP SA
static/connected/IGP
static/connected/IGP
BGP
686
sFlow
IP DA
static/connected/IGP
BGP
static/connected/IGP
srcAS and srcPeerAS
—
0
—
Exported
dstAS and dstPeerAS
—
Exported
—
Exported
Description
Extended gateway data
is not exported because
there is no AS
information.
src_as and src_peer_as
are zero because there
is no AS information for
IGP.
Prior to Dell Networking
OS version 7.8.1.0,
extended gateway data
is not exported because