Users Guide

If you did not enable any extended information, the show output displays the following (shown in bold).
DellEMC#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 EMC 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 108. Extended Gateway Summary
IP SA IP DA srcAS and srcPeerAS dstAS and dstPeerAS Description
static/connected/IGP static/connected/IGP — — Extended gateway data
is not exported because
there is no AS
information.
static/connected/IGP BGP 0 Exported src_as and src_peer_as
are zero because there
is no AS information for
IGP.
BGP static/connected/IGP
—
Exported
—
Exported
Prior to Dell EMC
Networking OS version
7.8.1.0, extended
gateway data is not
exported because IP DA
is not learned via BGP.
Version 7.8.1.0 allows
extended gateway
information in cases
where the source and
destination IP
addresses are learned
by different routing
protocols, and for cases
where is source is
reachable over ECMP.
BGP BGP Exported Exported Extended gateway data
is packed.
sFlow 833