Netgrimoire/Work/C9300GX-Port_Breakout.md
2026-02-20 19:24:28 +00:00

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Nexus Upgrade port Breakout true 2026-02-20T19:24:19.622Z markdown 2026-02-19T20:55:53.800Z

Nexus 9300 Port Migration — Old to New Architecture

Switch 1 — AT1EU-NEXUS-1

Old Port Description New Port Device Device Port
Ethernet1/2 Trunk FAS 2750 Catalyst T1/1/3
Ethernet1/3 Trunk FAS 2750 Catalyst T1/1/4
Ethernet1/9 Trunk A70-A Ethernet1/5/1 A70
Ethernet1/10 Trunk A70-A Ethernet1/5/3 A70
Ethernet1/11 Trunk A70-B Ethernet1/5/2 A70
Ethernet1/12 Trunk A70-B Ethernet1/5/4 A70
Ethernet1/17 Trunk 500e-X1 Ethernet1/26 (10G) Firewall X1
Ethernet1/23 Access L3 HLCI JAVELIN (Allow STP-BPDU) Catalyst T1/1/5
Ethernet1/24 Access L3 HLCI ROCK(L3)MLS (Allow STP-BPDU) Catalyst T1/1/6
Ethernet1/25 Trunk 6554-1:25 Ethernet1/1/1 UCS 6554-1 1/25
Ethernet1/26 Trunk 6554-1:26 Ethernet1/1/3 UCS 6554-1 1/26
Ethernet1/27 Trunk 6554-2:27 Ethernet1/1/2 UCS 6554-2 1/27
Ethernet1/28 Trunk 6554-2:28 Ethernet1/1/4 UCS 6554-2 1/28
Ethernet1/45 Trunk 9300 Ethernet1/24 (10G) Catalyst 9300 T1/1/1
Ethernet1/46 Trunk 9300 Ethernet1/25 (10G) Catalyst 9300 T1/1/2
Ethernet1/47 Trunk Peer-Link (Allow STP) Ethernet1/27 NEXUS-2 Peer
Ethernet1/48 Trunk Peer-Link (Allow STP) Ethernet1/28 NEXUS-2 Peer

Legend: in New Port column indicates the connection moves to the listed Device/Port with no renumbered Nexus port. 25G breakout ports (1/1/x and 1/5/x) are carved from 100G uplinks via interface breakout module 1 port X map 25g-4x.


Switch 2 — AT1EU-NEXUS-2

Old Port Description New Port Device Device Port
Ethernet1/2 Trunk FAS 2750-A Catalyst T2/1/3
Ethernet1/3 Trunk FAS 2750-B Catalyst T2/1/4
Ethernet1/9 Trunk A70-A Ethernet1/5/1 A70
Ethernet1/10 Trunk A70-A Ethernet1/5/3 A70
Ethernet1/11 Trunk A70-B Ethernet1/5/2 A70
Ethernet1/12 Trunk A70-B Ethernet1/5/4 A70
Ethernet1/16 Access NetApp XFER Catalyst T2/1/7
Ethernet1/17 Trunk 500e-X1 Ethernet1/26 (10G) Firewall X1
Ethernet1/22 Access L4 HLCI JAVELIN (Allow STP-BPDU) Catalyst T2/1/5
Ethernet1/24 Access L4 HLCI ROCK(L4)MLS (Allow STP-BPDU) Catalyst 21/1/6
Ethernet1/25 Trunk 6554-2:25 Ethernet1/1/1 UCS 6554-2 1/25
Ethernet1/26 Trunk 6554-2:26 Ethernet1/1/3 UCS 6554-2 1/26
Ethernet1/27 Trunk 6554-1:27 Ethernet1/1/2 UCS 6554-1 1/27
Ethernet1/28 Trunk 6554-1:28 Ethernet1/1/4 UCS 6554-1 1/28
Ethernet1/45 Trunk 9300 Ethernet1/24 (10G) Catalyst 9300 T1/1/2
Ethernet1/46 Trunk 9300 Ethernet1/25 (10G) Catalyst 9300 T2/1/2
Ethernet1/47 Trunk Peer-Link (Allow STP) Ethernet1/27 NEXUS-1 Peer
Ethernet1/48 Trunk Peer-Link (Allow STP) Ethernet1/28 NEXUS-1 Peer

Legend: in New Port column indicates the connection moves to the listed Device/Port with no renumbered Nexus port. 25G breakout ports (1/1/x and 1/5/x) are carved from 100G uplinks via interface breakout module 1 port X map 25g-4x.


Summary of Changes

Change Type Details
Breakout (100G → 4x25G) Ports 1, 5 on both switches broken out to 25G sub-interfaces for UCS FI and A70 storage connectivity
UCS 6554 FI connections Old Ethernet1/251/28 (fixed 1/x ports) → New Ethernet1/1/11/1/4 (breakout sub-ports)
A70 Storage connections Old Ethernet1/91/12 (fixed 1/x ports) → New Ethernet1/5/11/5/4 (breakout sub-ports)
9300 Uplinks Old Ethernet1/451/46 → New Ethernet1/241/25 (10G, connecting to Catalyst T1/1/1T1/1/2)
500e Firewall Old Ethernet1/17 → New Ethernet1/26 (10G, firewall X1)
Peer-Link Old Ethernet1/471/48 → New Ethernet1/271/28 (both switches)
Moved to Catalyst FAS 2750, HLCI JAVELIN, HLCI ROCK, and (Sw2 only) NetApp XFER ports migrated off the Nexus to a downstream Catalyst switch