• Author : Ronald David Hurtado Ulfe


Testing lanz and reading congestion values

About the next record using lanz   INGESTA2#show queue-monitor length   Report generated at 2018-03-15 01:29:22 E-End, S-Start, P-Polling, TC-Traffic Class * Max queue length during period of congestion Type    Time                              Intf(TC)      Queue       Duration    Ingress                                                         Length                  Port-set              ...
Continue reading →

How to increase buffer in a port for 7010T?

I have the next sh interfaces ethernet 23 counters queue Port               InDropPkts    OutUcDropPkts    OutMcDropPkts Et23                        0              597                0 sh interfaces ethernet 23 counters queue detail Port     TxQ   Counter/pkts      Counter/bytes      Drop/pkts         Drop/bytes ——- —-   ————       ————   ————       ———— Et23     UC0              0                  0 ...
Continue reading →

How was this value of 50 ms calculated for 7048T-A related to size of 768 MB?

Arista friends: With 768 MB of packet buffer memory, the architecture scales in congestion scenarios and all ports can simultaneously buffer up to 50ms of traffic without any drops. How was done this calculation for 50 ms considering that we  have 768MB for 48x 1 Gbps + 4 x10 Gbps. how was this value of 50 ms calculated for 7048T-A related to size of 768 MB? 768 MB x 8 bytes ~6144000 bits for 48x 1 Gbps + 4 x10 Gbps interfaces?  

reading drops of queues

What is the OID to read drop pkts and drop bytes of queues in Arista? Are they useful to discover congestion? Instead of reading this queues can we read other parameter to discover a switch with congestion? Maybe usage of buffers or memory. What is the command we can use to discover congestion? sh interfaces ethernet 48 counters queue detail Port TxQ Counter/pkts Counter/bytes Drop/pkts Drop/bytes ------- ---- ------------ ------------ ------------ ------------ Et48 UC0 0 0 0 0 Et48 UC1 1487751 411075407 0 0 Et48 UC2 0 0 0 0 Et48 UC3 0 0 0 0 Et48 UC4 0 0...
Continue reading →

Understanding discards of interface

  In which cases of network behaviour i can have input discards and output discards? What is the relation of this counters with buffer size and queues? sh interfaces ether 17 Ethernet17 is up, line protocol is up (connected) Hardware is Ethernet, address is 444c.a8b5.fd8c (bia 444c.a8b5.fd8c) Description: USG1000 Ethernet MTU 9214 bytes , BW 1000000 kbit Full-duplex, 1Gb/s, auto negotiation: on, uni-link: n/a Up 3 days, 19 hours, 1 minutes, 34 seconds Loopback Mode : None 0 link status changes since last clear Last clearing of "show interface" counters 3 days, 18:07:24 ago 5 seconds input rate 537 kbps...
Continue reading →

Switching capacity of MLAG

When we have a single switch like 7150S-24 We have Switching capacity = 480 Gbps =24 port x 2 x 10 Gbps. Is backplane capacity the same value for Arista? If we do MLAG using 2 10 Gbps ports to link 2 switches 7150S-24. Do we have the double of switching capacity for total MLAG. If we have MLAG using 2 ports in each switch. now we have 22 ports available in each switch. So we have 22 x 2 x 10 Gbps = 440 Gbps for the whole MLAG. Is this calculation valid? What about total backplane capacity when...
Continue reading →

What part numbers of Arista can replace the next requirements?

What are the part numbers we can use with Arista for the next requirements? N9K-C93120TX Nexus 9300 with 96p 1/10G-T and 6p 40G QSFP N9K-DCNM-PAK N9000 DCNM License PAK ExpansionCON-SAU-N9DCNMPK SW APP SUPP + UPGR N9000 DCNM License PAK ExpansionDCNM-LAN-N93-K9 DCNM for LAN Advanced Edt. for Nexus 9300 switchesCON-SAU-N93LANK9 SW APP SUPP + UPGR DCNM for LAN Advance

What is the equivalent features in Arista for the next Cisco requirements?

Here we have the requirements for Cisco WS-C4500X-16SFP+ Catalyst 4500-X 16 Port 10G IP Base, Front-to-Back, No P/SCON-PSRT-WSC16SFX PRTNR SS 8X5XNBD Catalyst 4500-X 16 Port 10G IP Base, FroC4KX-PWR-750AC-R/2 Catalyst 4500X 750W AC front to back cooling 2nd PWR supplyC4KX-PWR-750AC-R Catalyst 4500X 750W AC front to back cooling power supplyC4KX-NM-BLANK Catalyst 4500X Network Module BlankC4500X-IPB IP Base license for Catalyst 4500-XCAB-US515-C15-US NEMA 5-15 to IEC-C15 8ft USS45XUK9-38E CAT4500-X Universal Crypto ImageCAB-CON-C4K-RJ45 Console Cable 6ft with RJ-45-to-RJ-45 What is included by default in each Arista switch?

Errors in openflow setting

I have the next errors what is wrong ? #sh openflow OpenFlow configuration: Enabled DPID: 0x0000444ca8a6b1bb Description: Controllers: configured: connected: negotiated version: Version 1.0 connection count: 4 keepalive period: 10 sec Flow table state: Enabled Flow table profile: full-match Forwarding pipeline: flow Bind mode: bindModeMonitor IP routing state: Disabled Shell command execution: Enabled Total matched: 191752 packets localhost#show oplocalhost#show openfllocalhost#show openflow ? flows Show OpenFlow flow table groups Show OpenFlow groups ports Show OpenFlow port-interface map profiles Show OpenFlow table profiles for current bind mode queues Show OpenFlow transmit queue stats statistics Show OpenFlow table statistics > Redirect...
Continue reading →


Get every new post on this blog delivered to your Inbox.

Join other followers: