[j-nsp] [EXT] EX4300: Framing error with macsec enabled
Chuck Anderson
cra at WPI.EDU
Sun Apr 19 19:16:46 EDT 2020
Yes, I see CRC errors on EX3400s with MACsec termination, but only on one side.
Here is my topology:
>From A to B:
[EX3400-A]-->--[push-vlan-tag-on-MX480]-->-L2 vlan-->-[Carrier-ASR9k-pop-vlan-tag]-->--[EX3400-B]
MACsec L2 connection L2 xconnect MACsec
>From B to A:
[EX3400-A]--<--[pop-vlan-tag-on-MX480]--<-L2 vlan--<-[Carrier-ASR9k-push-vlan-tag]--<--[EX3400-B]
MACsec L2 connection L2 xconnect MACsec
I also have a redundant path with EX3400-C (different local switch) and EX3400-B (same remote switch).
I see the CRC errors increasing at a rate of about 2-3 per minute, but only on EX3400-A and EXX3400-C.
All EX3400s were initially running 15.1X53-D57. Now A and C are running 18.2R3-S2 and B is running 15.1X53-D592. But the problem has been consistent throughout all releases, no improvement with upgrades.
I wonder if something the carrier's ASR9k is sending down the VLAN towards EX3400-A and -C is causing this? If not, maybe it is the MX480s sending something locally to EX3400-A and -C?
The following PRs don't seem relevant--I'm not doing anywhere close to 60% utilization:
https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1261567
And I'm not seeing "runts":
https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1469663
I'm only seeing Framing errors (CRC/Align errors):
admin at ex3400-a> show interfaces extensive xe-0/2/0 |match 22791
Errors: 227911, Drops: 0, Framing errors: 227911, Runts: 0, Policed discards: 0, L3 incompletes: 0, L2 channel errors: 0, L2 mismatch timeouts: 0, FIFO errors: 0, Resource errors: 0
CRC/Align errors 227911 0
A few seconds later, it increased to 227913:
MAC statistics: Receive Transmit
Total octets 17953647117156 3221741316352
Total packets 13200126465 7010832956
Unicast packets 13194022205 7004785539
Broadcast packets 5272 0
Multicast packets 6098988 6047417
CRC/Align errors 227913 0
FIFO errors 0 0
MAC control frames 0 0
MAC pause frames 0 0
Oversized frames 0
Jabber frames 0
Fragment frames 0
VLAN tagged frames 13196813130
Code violations 0
Rate is only 24 Mbps, 2200 pps:
Manager at sw-gp1-macsec-1> show interfaces extensive xe-0/2/0 |match "bps|pps"
Link-level type: Ethernet, MTU: 9192, LAN-PHY mode, Speed: 10Gbps, BPDU Error: None, Loop Detect PDU Error: None, Ethernet-Switching Error: None, MAC-REWRITE Error: None,
Input bytes : 17954037433802 24242136 bps
Output bytes : 3221749625049 498504 bps
Input packets: 13200416854 2190 pps
Output packets: 7010941872 830 pps
On Sun, Apr 19, 2020 at 09:37:23AM +0200, james list wrote:
> Dear experts,
> I've an EX4300 (Junos 17.3R3-S3.3) which have a constant Framing error
> counter increase also if the traffic is very low.
> Interface is connected to a WAN link from a carrier and bw is 1 Gbs but
> traffic max is actually 100 Mbs and on average 10 Mbs.
> On this interface I've enabled macsec, if I disable macsec the issue is not
> in place but unfortunately macsec is mandatory to be kept enabled.
>
> I cannot sniff since the packet is encrypted but to me it seems that
> traffic is not lost, if I have 100 Mbs inside from WAN I see 100 Mbs
> outside to DataCenter.
>
> Due to the fact that monitoring system contantly raise an alert, I'd like
> to know how to fix it or at least let the EX4300 do not raise the counter
> increase.
>
> I've opened a JTAC case but they found a PR which is currently related to a
> Broadcom chipset raising framing errors during spikes (ie 70% of the
> interface bandwidth).
>
> https://kb.juniper.net/InfoCenter/index?page=content&id=KB32264&actp=METADATA
>
> Also enabling flow-control as described in the KB do not change the
> behaviour.
>
> I'm wondering if there could the option we're receiving some sort on
> "unknown protocol" from the carrier (I remeber Cisco has something like
> that) or could be an harware issue..
>
> On the other side of the link, the other EX4300 (side B) do not experience
> the same issue but the traffic is mostly from side B to side A.
>
> Here an example of the output, statistics cleared and after 1 minute I get
> 12 framing errors with 2 Mbs running on the WAN link:
>
> @EX4300-A> show interfaces ae0 extensive
> Physical interface: ae0, Enabled, Physical link is Up
> Interface index: 220, SNMP ifIndex: 549, Generation: 131
> Description: xxx
> Link-level type: Ethernet, MTU: 9192, Speed: 1Gbps, BPDU Error: None,
> Ethernet-Switching Error: None, MAC-REWRITE Error: None,
> Loopback: Disabled, Source filtering: Disabled, Flow control: Enabled,
> Minimum links needed: 1, Minimum bandwidth needed: 1bps
> Device flags : Present Running
> Interface flags: SNMP-Traps Internal: 0x0
> Current address: cc:e5:94:11:43:23, Hardware address: cc:e5:94:11:43:23
> Last flapped : 2020-04-19 02:05:05 CEST (06:50:45 ago)
> Statistics last cleared: 2020-04-19 09:11:22 CEST (00:01:00 ago)
> Traffic statistics:
> Input bytes : 10014863 2205456 bps
> Output bytes : 4095720 582456 bps
> Input packets: 33292 624 pps
> Output packets: 33023 568 pps
> IPv6 transit statistics:
> Input bytes : 0
> Output bytes : 0
> Input packets: 0
> Output packets: 0
> Input errors:
> Errors: 12, Drops: 0, Framing errors: 12, Runts: 0, Giants: 0, Policed
> discards: 0, Resource errors: 0
> Output errors:
> Carrier transitions: 0, Errors: 0, Drops: 0, MTU errors: 0, Resource
> errors: 0
> Egress queues: 12 supported, 11 in use
>
>
> @EX4300-A> show interfaces ge-0/0/0 extensive
> Physical interface: ge-0/0/0, Enabled, Physical link is Up
> Interface index: 649, SNMP ifIndex: 509, Generation: 140
> Description: WAN link
> Link-level type: Ethernet, MTU: 9192, LAN-PHY mode, Link-mode:
> Full-duplex, Speed: 1000mbps, BPDU Error: None, Loop Detect PDU Error: None,
> Ethernet-Switching Error: None, Source filtering: Disabled
> Ethernet-Switching Error: None, MAC-REWRITE Error: None, Loopback:
> Disabled, Flow control: Enabled, Auto-negotiation: Enabled,
> Remote fault: Online, Media type: Copper, IEEE 802.3az Energy Efficient
> Ethernet: Disabled, Auto-MDIX: Enabled
> Device flags : Present Running
> Interface flags: SNMP-Traps Internal: 0x0
> Link flags : None
> CoS queues : 12 supported, 12 maximum usable queues
> Hold-times : Up 0 ms, Down 0 ms
> Current address: cc:e5:94:11:43:23, Hardware address: cc:e5:94:11:43:23
> Last flapped : 2020-03-28 18:43:04 CET (3w0d 13:30 ago)
> Statistics last cleared: 2020-04-19 09:11:18 CEST (00:02:18 ago)
> Traffic statistics:
> Input bytes : 21782579 932296 bps
> Output bytes : 17898068 498704 bps
> Input packets: 76844 569 pps
> Output packets: 82594 590 pps
> IPv6 transit statistics:
> Input bytes : 0
> Output bytes : 0
> Input packets: 0
> Output packets: 0
> Input errors:
> Errors: 28, Drops: 0, Framing errors: 28, Runts: 0, Policed discards:
> 0, L3 incompletes: 0, L2 channel errors: 0,
> L2 mismatch timeouts: 0, FIFO errors: 0, Resource errors: 0
>
>
> Here part of the config:
>
> @EX4300-A> show configuration interfaces ge-0/0/0 | display set
> set interfaces ge-0/0/0 ether-options auto-negotiation
> set interfaces ge-0/0/0 ether-options flow-control
> set interfaces ge-0/0/0 ether-options 802.3ad ae0
>
>
> @EX4300-A> show configuration interfaces ae0 | display set
> set interfaces ae0 mtu 9192
> set interfaces ae0 aggregated-ether-options flow-control
> set interfaces ae0 aggregated-ether-options lacp active
> set interfaces ae0 aggregated-ether-options lacp periodic fast
> set interfaces ae0 unit 0 family ethernet-switching interface-mode trunk
> set interfaces ae0 unit 0 family ethernet-switching vlan members 2228
> set interfaces ae0 unit 0 family ethernet-switching vlan members 2552-2553
> set interfaces ae0 unit 0 family ethernet-switching filter input QOS
>
>
> @EX4300-A> show configuration security macsec | display set
> set security macsec connectivity-association MAC security-mode static-cak
> set security macsec connectivity-association MAC pre-shared-key ckn xxxx
> set security macsec connectivity-association MAC pre-shared-key cak
> "tttttvvvv"
> set security macsec connectivity-association MAC exclude-protocol lldp
> set security macsec connectivity-association MAC exclude-protocol lacp
> set security macsec interfaces ge-0/0/0 connectivity-association MAC
>
>
> Dear all, an help is appreciated and welcomme, please let me thank in
> advance anyone will give an hint.
>
> Cheers
> James
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