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--- network_stuff:arista:arista [2025/05/17 18:40] – jotasandoku
+++ network_stuff:arista:arista [2025/10/04 20:42] (current) – [decoding the model code] jotasandoku
@@ Line 1: / Line 1: @@
+** SWITCHES LINES **
+  * **7050X3** - 48 x 25 G SFP28 + 8 x 100 G QSFP
+    * role: leaf / top-of-rack for dense 25 G servers and 100 G uplinks
+    * asic: Broadcom Trident3
+  * **7060X5** - 32 x 400 G QSFP-DD (break-outs up to 2 x 800 G)
+    * role: 400 / 800 G spine for AI-ML clusters and hyperscale clouds
+    * asic: Broadcom Tomahawk5
+  * **7060X4** - 32 x 400 G QSFP-DD
+    * role: 400 G super-spine or fan-out to 4 x 100 G
+    * asic: Broadcom Tomahawk4
+  * **7130** - layer-1 matrix, 4 ns port-to-port, FPGA options
+    * role: ultra-low-latency taps, matrix switches, time stamping
+    * asic: Xilinx UltraScale+ FPGA cross-point
+  * **7150** - ~350 ns L2/L3 forwarding
+    * role: high-frequency trading leaf or edge
+    * asic: Intel (Fulcrum) Alta FM6000
+  * **7160-48TC6** - 48 x 10GBASE-T + 6 x 100 G QSFP
+    * role: high-density 10 G leaf or campus aggregation
+    * asic: Broadcom Trident3 with AlgoMatch
+  * **7170** - 32 / 64 x 100 G QSFP with P4-programmable pipeline
+    * role: telemetry, service chaining, packet engineering
+    * asic: Intel Barefoot Tofino
+  * **7280R3** - 32 x 100 G QSFP (deep buffer)
+    * role: universal leaf / edge router with internet-scale tables
+    * asic: Broadcom Jericho2
+  * **7508R3** - modular, up to 288 x 400 G OSFP or QSFP-DD
+    * role: universal spine or data-centre core up to 230 Tbps
+    * asic: Broadcom Jericho2C+
+===== decoding the model code =====
+  * **number block** – family
+    * 70xx fixed switching
+    * 72xx deep-buffer fixed
+    * 75xx modular chassis
+  * **first letter**
+    * X - high-performance fixed (Trident / Tomahawk)
+    * R - deep-buffer routing (Jericho)
+    * S - scaled tables
+  * **port letters** (after the number)
+    * Q - 40 G QSFP+
+    * C - 100 G QSFP28 (or 400 G QSFP-DD when paired with D)
+    * D - QSFP-DD 400 G
+    * O - OSFP 400 G
+    * Y - 25 G SFP28
+    * T - 10GBASE-T copper
+  * **suffixes**
+    * A / F - airflow (A front-to-back, F back-to-front)
+    * M - large memory for huge routing tables
+    * K - inline MACsec / crypto
+    * R3 - third hardware generation
+----
 __**ARISTA**__\\
 To enable scp on the management vrf:\\
@@ Line 93: / Line 161: @@
 ----
-SWITCHES LINE:\\
-  * 7280R : 32 x 100G QSFP
-    * Universal leaf leaf. Fixed configuration. Up to 100G. ld5
-  * 7508R3: modular
-    * For cloud design and datacenter
-    * 400G OSFP or QSFP-DD
-  * 7130 : L1 switches with optional FPGAs. As low latency as 4ns.
-  * 7150 : ultra low latency (400ns)
-  * 7160-48TC6
-    * 48 x 10GBASE-T, 6 x 100G QSFP
 Features:
@@ Line 222: / Line 278: @@
 === LAYER 1 SWITCHING ===
 [[https://chatgpt.com/s/dr_68270c44fb0c81919fd19c5ff7fbc074|External Link]]
+----
+=== configuration replace ===
+  scp new.cfg admin@SW1:/mnt/flash/new.cfg    ! scp the new config to the switch
+  ! ssh to the switch
+  dir flash:    ! check new.cfg is there
+  copy running-config flash:prechange.cfg    ! make a checkpoint (golden backup of current running)
+  wr
+  reload in 10    ! failsafe
+  configure replace flash:new.cfg    ! do the config replace
+  !
+  ! wait until 9 mins to be sure not locked out due to routing reconverging down thee line!
+  reload cancel    ! if all looks good, cancel the reload
+  ! configure replace flash:prechange.cfg     !  only if you need to roll back, restore the checkpoint

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