Re: [c-nsp] Anycast GW for L2 subnet
Hi Adam, please see inline below: At 03:58 PM 8/4/2015 Tuesday, Adam Vitkovsky quipped: Has anyone played with Anycast HSRP with fabric path please? Just would like to confirm I understand it correctly. So ISIS calculates best path to the anycast switch ID advertising the HSRP MAC There are no MAC advertisements in FP, routing is based on switch IDs (SID). and since I can manipulate metrics on links between spine and leaf switches I should be able to dictate which leaf switches should be using which GWs right? You could do that but the idea with anycast HSRP is that all participating HSRP routers equally distribute the L3 switching load. Because only paths to anycast switch ID with equal costs are considered for multipathing right? (i.e. thereâs no unequal cost load sharing correct?) Correct, it is ECMP only. The model is that all anycast HSRP routers have their own unique SID but also an emulated SID shared among them all. All advertise that ESID, and any FP switch with equal path cost to 2 or more of those will load balance traffic destined to the HSRP MAC among them. Typical topology is spine/leaf but any topology will work. Note that only the control-plane Active router is the one that responds to ARP & sources HSRP hellos with the HSRP MAC (using the ESID as the source SID in FP frames). See section 10 here for a bit more: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series-switches/white_paper_c11-687554.html Hope that helps, Tim Tim Stevenson, tstev...@cisco.com Routing & Switching CCIE #5561 Distinguished Engineer, Technical Marketing Data Center Switching Cisco - http://www.cisco.com +1(408)526-6759 ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
[c-nsp] Anycast GW for L2 subnet
Hi folks, It is interesting that there seem to be only two options to accomplish anycast GWs for the L2 subnet with selection based on closest proximity to a GW (would have thought there’re plenty of solutions out there with all the DC hype dating several years back). I only found Anycast HSRP with fabric path and the Distributed Anycast GW for VXLAN with MP-BGP EVPN Control Plane –but that one seem to be only for the big boys :) Has anyone played with Anycast HSRP with fabric path please? Just would like to confirm I understand it correctly. So ISIS calculates best path to the anycast switch ID advertising the HSRP MAC and since I can manipulate metrics on links between spine and leaf switches I should be able to dictate which leaf switches should be using which GWs right? Because only paths to anycast switch ID with equal costs are considered for multipathing right? (i.e. there’s no unequal cost load sharing correct?) Thank you adam Adam Vitkovsky IP Engineer T: 0333 006 5936 E: adam.vitkov...@gamma.co.uk W: www.gamma.co.uk This is an email from Gamma Telecom Ltd, trading as “Gamma”. The contents of this email are confidential to the ordinary user of the email address to which it was addressed. This email is not intended to create any legal relationship. No one else may place any reliance upon it, or copy or forward all or any of it in any form (unless otherwise notified). If you receive this email in error, please accept our apologies, we would be obliged if you would telephone our postmaster on +44 (0) 808 178 9652 or email postmas...@gamma.co.uk Gamma Telecom Limited, a company incorporated in England and Wales, with limited liability, with registered number 04340834, and whose registered office is at 5 Fleet Place London EC4M 7RD and whose principal place of business is at Kings House, Kings Road West, Newbury, Berkshire, RG14 5BY. ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] asr1k looking for advice on packet capturing
Hi Bryan, Does the config work when it is service instance specific? I think the logic is that the main interface itself is not accepting any frames and that it's just the service instances that allow specific frames (as dictated by the encapsulation cmd). adam > Adam Vitkovsky IP Engineer T: 0333 006 5936 E: adam.vitkov...@gamma.co.uk W: www.gamma.co.uk This is an email from Gamma Telecom Ltd, trading as “Gamma”. The contents of this email are confidential to the ordinary user of the email address to which it was addressed. This email is not intended to create any legal relationship. No one else may place any reliance upon it, or copy or forward all or any of it in any form (unless otherwise notified). If you receive this email in error, please accept our apologies, we would be obliged if you would telephone our postmaster on +44 (0) 808 178 9652 or email postmas...@gamma.co.uk Gamma Telecom Limited, a company incorporated in England and Wales, with limited liability, with registered number 04340834, and whose registered office is at 5 Fleet Place London EC4M 7RD and whose principal place of business is at Kings House, Kings Road West, Newbury, Berkshire, RG14 5BY. -Original Message- > From: cisco-nsp [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of > Bryan Tabb > Sent: 04 August 2015 04:45 > To: cisco-nsp@puck.nether.net > Subject: [c-nsp] asr1k looking for advice on packet capturing > > Hi > > Is it possible to use the embedded packet capture to capture traffic that is > just getting bridged through a service instance? > > I've got an ASR1k that gets packets with 3 vlan tags in one interface, 2 tags > are popped, 1 is pushed and it pops out another interface where the layer 3 > stuff happens. > > On the physical interface config looks something like below. > > interface GigabitEthernet0/0/3 > mtu 1600 > no ip address > negotiation auto > service instance 10 ethernet > encapsulation dot1q 10 second-dot1q 20 > rewrite ingress tag pop 2 symmetric > bridge-domain 10 > ! > service instance 11 ethernet > encapsulation dot1q 10 second-dot1q 30 > rewrite ingress tag pop 2 symmetric > bridge-domain 11 > ! > > I've used the EPC before on sub interface and other IP interfaces but when I > run the below to try and capture just ICMP nothing is captured into the > buffer. > The reason for the ICMP filter is there is around 350 Mbps running through > the physical interface and didn't think it could handle capturing everything. > > conf t > ip access-list ext acl-capture > permit icmp any any > exit > monitor capture mycap access-list acl-capture > monitor capture mycap buffer size 20 > monitor capture mycap interface GigabitEthernet0/0/3 both > monitor capture mycap start > > > Any ideas? > > Thanks in advance! > > Bryan > ___ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
Re: [c-nsp] ASR920 Microbursts
From what I have understood it is a 12MB global buffer pool. On 4 Aug 2015 4:47 pm, "Jordi Magrané Roig" wrote: > Dear Colleagues, > > > > Recently I have installed one ASR920 and I have configured on 1G interface > one service instance with an outbound policy-map shaping to 30 Mbps. The > problem is that I noticed that the ASR920 has the same microburst issue > than > the ME3600. I have tried to adjust the queue-limit in order to avoid drops > but then the latency increments. I have configured: > > > > policy-map POLICY_CUSTOMER_EGRESS_30Mbps > > class class-default > > shape average 3000 > > > > I have tried also with different classes of service but the issue still > persist. > > > > I would like to know the recommendation about the queue-limit size, the > relation with the values of burst committed and then what should be the > recommended configuration of shaping, recommendations about fine tunning > the > shaping. I have noticed that there Cisco platforms that shape better, for > example the ASR9001 or 7600 with ES+ shape better than ASR1000 with > SPA-5X1GE-V2 or ME3600. > > > > Another problem is that I didn’t find enough information about QoS on > ASR920 > platform. Somebody knows the default queue size of 1G port? How the packet > buffer works? Is it like ME3600 (shared queue buffer per ASIC)? > > > > Thanks! > > > > > > ___ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
[c-nsp] ASR920 Microbursts
Dear Colleagues, Recently I have installed one ASR920 and I have configured on 1G interface one service instance with an outbound policy-map shaping to 30 Mbps. The problem is that I noticed that the ASR920 has the same microburst issue than the ME3600. I have tried to adjust the queue-limit in order to avoid drops but then the latency increments. I have configured: policy-map POLICY_CUSTOMER_EGRESS_30Mbps class class-default shape average 3000 I have tried also with different classes of service but the issue still persist. I would like to know the recommendation about the queue-limit size, the relation with the values of burst committed and then what should be the recommended configuration of shaping, recommendations about fine tunning the shaping. I have noticed that there Cisco platforms that shape better, for example the ASR9001 or 7600 with ES+ shape better than ASR1000 with SPA-5X1GE-V2 or ME3600. Another problem is that I didnt find enough information about QoS on ASR920 platform. Somebody knows the default queue size of 1G port? How the packet buffer works? Is it like ME3600 (shared queue buffer per ASIC)? Thanks! ___ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
