Important Points To Remember - Dell S3048-ON Configuration Manual

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 70. Extended Gateway Summary
IP SA
static/connected/IGP
static/connected/IGP
BGP
BGP
IP DA
static/connected/IGP
BGP
static/connected/IGP
BGP
srcAS and srcPeerAS
—
0
—
Exported
Exported
dstAS and dstPeerAS
—
Exported
—
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 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.
Extended gateway data is
packed.
sFlow 763